Composite antistatic fiber, method for its production and method for adjusting its fineness and / or volume resistivity

Abstract

This invention provides composite layer antistatic fibers, their preparation method, and methods for adjusting their fineness and / or volume resistivity, belonging to the field of functional fiber technology. The first type of fiber includes a core layer and a conductive composition layer. The second type of fiber includes a core layer, a conductive composition layer, and a sheath layer, with the sheath layer covering the outside of the conductive composition layer. The core layer is made of a fiber-forming polymer, the middle layer is made of the conductive composition layer, and the sheath layer is made of a soluble fiber-forming polymer. The preparation method of the first type of fiber can produce the first type of fiber; the preparation method of the second type of fiber can produce the second type of fiber. The method for adjusting the fineness and / or volume resistivity of the first composite layer fiber includes: adjusting the types and mass ratios of the components of the sheath layer, the conductive composition layer, and the core layer during the preparation method of the first type of fiber, so that the resulting composite layer fiber has a set fineness and / or volume resistivity. This method can produce composite layer fibers with excellent antistatic properties.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of functional fiber and its preparation method, in particular to a kind of composite layer antistatic fiber, its preparation method and its fineness and / or volume resistivity adjusting method. BACKGROUND

[0002] Static electricity is a common physical phenomenon, which involves the accumulation and distribution of electric charge. When the electric charge on the surface of an object is unbalanced, static electricity occurs. This phenomenon can be seen everywhere in life, for example, in dry weather, you may hear a crackling sound when taking off your clothes, which is the result of static discharge. There are mainly two ways to generate static electricity: triboelectricity and induction. Triboelectricity is due to the contact between two substances, in which the electrons of one substance are transferred to the other, resulting in opposite charges on both. Induction occurs when a charged body is brought close to an uncharged body, which will induce negative and positive charges on both ends of the uncharged body. The existence of static electricity can have some impact on life and production, for example, in the electronics industry, static electricity can damage delicate electronic components. In the prior art, the performance of light-colored composite layer antistatic fiber is not ideal, and the preparation method of composite layer antistatic fiber is complex and costly. SUMMARY

[0003] Therefore, the present application provides a kind of composite layer antistatic fiber, its preparation method and its fineness and / or volume resistivity adjusting method, by the preparation method, composite layer antistatic fiber with excellent antistatic performance can be prepared, and the fineness and / or volume resistivity of the composite layer antistatic fiber can be adjusted, so as to be more suitable for practical use.

[0004] To achieve the first purpose, the first composite layer antistatic fiber provided by the present application has the following technical solutions:

[0005] The first composite layer antistatic fiber provided by the present application comprises a core layer and a conductive composition layer from inside to outside, wherein,

[0006] The core layer is made of a fiber-forming polymer, and the core layer and the conductive composition layer have a common core shaft.

[0007] The first composite layer antistatic fiber provided by the present application can also be further implemented by the following technical measures.

[0008] Preferably, the fiber-forming polymer is selected from one of polyester, polyamide polymer or their compounds and mixtures.

[0009] Preferably, the conductive composition is selected from one of CuI, KI, ATO@TiO2, ATO@mica, ATO@SiO2 nano-conductive powder or intrinsic antistatic polymer or their mixtures.

[0010] Preferably, the conductive powder has a mass percentage content of 0%-50% in the conductive composition.

[0011] Preferably, the intrinsic antistatic polymer in the conductive composition has a mass percentage of 0%-90%.

[0012] To achieve the second objective mentioned above, the technical solution for the second composite layer antistatic fiber provided by the present invention is as follows:

[0013] The second type of composite antistatic fiber provided by the present invention comprises, from the inside out, a core layer, a conductive composition layer, and a sheath layer, wherein the sheath layer covers the outer side of the conductive composition layer, wherein...

[0014] The core layer is made of a fiber-forming polymer, and the sheath layer is made of a soluble polymer;

[0015] The core layer, the conductive composition layer, and the skin layer have a common core axis.

[0016] The second type of composite layer antistatic fiber provided by the present invention can be further realized by the following technical measures.

[0017] Preferably, the skin layer is soluble in an aqueous solution, an alkaline solution, or a mixture thereof.

[0018] Preferably, the fiber-forming polymer is selected from polyester, polyamide polymer, or their compounds or mixtures.

[0019] Preferably, the conductive composition is selected from one or a mixture thereof, including CuI, KI, ATO@TiO2, ATO@mica, ATO@SiO2 nanoconductive powder or intrinsic antistatic polymer.

[0020] Preferably, the conductive powder has a mass percentage content of 0%-50% in the conductive composition.

[0021] Preferably, the intrinsic antistatic polymer in the conductive composition has a mass percentage of 0%-90%.

[0022] To achieve the third objective mentioned above, the technical solution of the first method for preparing composite layer antistatic fibers provided by the present invention is as follows:

[0023] The method for preparing the first composite layer antistatic fiber provided by the present invention includes the following steps:

[0024] Preparation of intermediate products for conductive compositions;

[0025] The composite antistatic fiber is prepared by a composite spinning process, such that the composite antistatic fiber includes a core layer, a conductive composition layer and a sheath layer from the inside out, and the core layer, the conductive composition layer and the sheath layer have a common core axis.

[0026] The outer layer is dissolved and removed to obtain the composite antistatic fiber.

[0027] The method for preparing the first composite layer antistatic fiber provided by the present invention can be further realized by the following technical measures.

[0028] Preferably, the preparation of the conductive composition intermediate product specifically includes the following steps:

[0029] The fiber-forming polymer, conductive component, dispersant, and antioxidant are mixed to obtain a homogeneous conductive composition, wherein the amount of dispersant added is 0.5%-3.0% of the mass percentage of the conductive composition, and the amount of antioxidant added is 0.1%-1.0% of the mass percentage of the conductive composition.

[0030] The conductive composition is granulated to obtain an intermediate product of the conductive composition.

[0031] Preferably, the dispersant is selected from one or a mixture of several of ethylene bis-stearamide, ethylene bis-oleamide, ethylene bis-lauramide, hexamethylene bis-dodecyl stearamide, polyamide wax, ethylene bis-dodecyl stearamide, and hydroxyethyl ethylene bis-stearamide.

[0032] Preferably, the antioxidant is selected from hindered phenolic antioxidants, including one or a mixture of several of 1010, 1076, 1098, 1035, and 168.

[0033] Preferably, in the step of granulating the conductive composition to obtain the intermediate product of the conductive composition, the granulation temperature is 200℃-290℃ and the granulator speed is 50rpm-300rpm.

[0034] Preferably, the composite antistatic fiber is prepared by a composite spinning process, wherein the composite antistatic fiber comprises a core layer, a conductive composition layer and a sheath layer from the inside out, and the core layer, the conductive composition layer and the sheath layer have a common core axis. In the step of preparing the composite spinning process, the composite spinning method is melt composite spinning.

[0035] Preferably, in the melt composite spinning step, the mass ratio between the core fiber-forming polymer, the conductive composition intermediate product, and the soluble polymer is (3-6):(2-7):(1-3), and the spinning speed is 300m / min-4000m / min.

[0036] To achieve the fourth objective mentioned above, the technical solution for the preparation method of the second composite layer antistatic fiber provided by the present invention is as follows:

[0037] The method for preparing composite layer antistatic fibers provided by the present invention includes the following steps:

[0038] Preparation of intermediate products for conductive compositions;

[0039] The composite antistatic fiber is prepared by a composite spinning process, such that the composite antistatic fiber includes a core layer, a conductive composition layer and a sheath layer from the inside out, and the core layer, the conductive composition layer and the sheath layer have a common core axis.

[0040] The second method for preparing composite layer antistatic fibers provided by the present invention can be further implemented by the following technical measures.

[0041] Preferably, the preparation of the conductive composition specifically includes the following steps:

[0042] The fiber-forming polymer, conductive component, dispersant, and antioxidant are mixed to obtain a homogeneous conductive composition, wherein the amount of dispersant added is 0.5%-3.0% of the mass percentage of the conductive composition, and the amount of antioxidant added is 0.1%-1.0% of the mass percentage of the conductive composition.

[0043] The conductive composition is granulated to obtain an intermediate product of the conductive composition.

[0044] Preferably, the dispersant is selected from one or a mixture of several of ethylene bis-stearamide, ethylene bis-oleamide, ethylene bis-lauramide, hexamethylene bis-dodecyl stearamide, polyamide wax, ethylene bis-dodecyl stearamide, and hydroxyethyl ethylene bis-stearamide.

[0045] Preferably, the antioxidant is selected from hindered phenolic antioxidants, including one or a mixture of several of 1010, 1076, 1098, 1035, and 168.

[0046] Preferably, in the step of granulating the conductive composition to obtain the intermediate product of the conductive composition, the granulation temperature is 200℃-290℃ and the granulator speed is 50rpm-300rpm.

[0047] Preferably, the composite antistatic fiber is prepared by a composite spinning process, wherein the composite antistatic fiber comprises a core layer, a conductive composition layer and a sheath layer from the inside out, and the core layer, the conductive composition layer and the sheath layer have a common core axis. In the step of the composite spinning process, the composite spinning method is melt composite spinning.

[0048] Preferably, in the melt composite spinning step, the mass ratio between the core fiber-forming polymer, the conductive composition intermediate product, and the soluble polymer is (3-6):(2-7):(1-3), and the spinning speed is 300m / min-4000m / min.

[0049] Preferably, the fineness and / or volume resistivity of the antistatic fibers in the composite layer can be adjusted by regulating the types and mass ratios of the components in the skin layer, conductive composition layer, and core layer.

[0050] To achieve the fifth objective mentioned above, the first method for adjusting the fineness and / or volume resistivity of composite layer antistatic fibers provided by the present invention includes the following steps:

[0051] The first method for adjusting the fineness and / or volume resistivity of composite layer antistatic fibers provided by the present invention includes the following steps:

[0052] In the preparation method of the first composite layer antistatic fiber provided by the present invention, the types and mass ratios of the components of the skin layer, conductive composition layer and core layer are adjusted so that the obtained composite layer antistatic fiber has a set fineness and / or volume resistivity.

[0053] Compared with existing technologies, the composite layer antistatic fiber, its preparation method, and its fineness and / or volume resistivity adjustment method provided by this invention have the following advantages:

[0054] First, compared with antistatic fibers prepared using traditional dark conductive components such as carbon black, carbon nanotubes and graphene, light-colored antistatic fibers prepared using light-colored nano-conductive powders or intrinsic antistatic polymers as conductive functional components have the advantages of light-colored fiber color and dyeability.

[0055] Second, the light-colored antistatic fiber is prepared using the method provided in this patent, and the soluble fiber-forming polymer of the fiber skin is removed by hydrothermal or alkaline water treatment to prepare a light-colored antistatic fiber with a concentric double-layer structure containing a core skeleton and an intermediate conductive composition, which solves the problem that the light-colored antistatic composition has poor spinnability and cannot be spun into shape.

[0056] Third, by providing a skeleton to the fiber core layer, the mechanical properties of the fiber are improved, enabling it to meet the requirements of various weaving methods;

[0057] Fourth, by precisely controlling the content of light-colored conductive powder, intrinsic antistatic polymer, and the mass ratio of the three-layer structure in the conductive composition, the fineness and volume resistivity of the light-colored antistatic fiber can be adjusted, and the final light-colored antistatic fiber has good antistatic and mechanical properties.

[0058] In summary, the light-colored antistatic fibers prepared using the melt composite spinning technology of this patent have excellent antistatic and mechanical properties. The preparation process is relatively simple, and the prepared light-colored antistatic fibers have broad application prospects in the fields of civil textiles, home textiles, microelectronics, medicine, and precision instruments. Detailed Implementation

[0059] In view of this, the present invention provides a composite layer antistatic fiber, a method for preparing the same, and a method for adjusting the fineness and / or volume resistivity. Through this preparation method, a composite layer antistatic fiber with excellent antistatic properties can be obtained, and the fineness and / or volume resistivity of the composite layer antistatic fiber can be adjusted, thus making it more suitable for practical use.

[0060] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following detailed description, in conjunction with preferred embodiments, details the specific implementation, structure, features, and effects of a composite layer antistatic fiber, its preparation method, and its fineness and / or volume resistivity adjustment method according to the present invention. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0061] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships, such as A and / or B. Specifically, it can mean that A and B can be included at the same time, A can exist alone, or B can exist alone, and any of the above three situations can be met.

[0062] First composite layer antistatic fiber

[0063] The first type of composite layer antistatic fiber provided by the present invention comprises, from the inside out, a core layer and a conductive composition layer, wherein the core layer is made of a fiber-forming polymer, and the core layer and the conductive composition layer share a common core axis. In this configuration, the composite layer antistatic fiber exhibits excellent antistatic and mechanical properties.

[0064] The fiber-forming polymer is selected from polyester, polyamide, or compounds or mixtures thereof. In this case, by imparting a core skeleton to the fiber, the mechanical properties of the fiber are improved, enabling it to meet the requirements of various weaving methods.

[0065] The conductive composition is selected from one or a mixture thereof, including CuI, KI, ATO@TiO2, ATO@mica, ATO@SiO2 nano-conductive powder, or intrinsically antistatic polymers. These components are light-colored nano-inorganic conductive powders, intrinsically antistatic polymers, and mixtures thereof. This claim clarifies the scope of protection and allows for the preparation of light-colored antistatic fibers with good color adaptability. The "@" in "A@B" is typically used to represent a core-shell structure, where A is the shell and B is the core. In this embodiment, the expression "ATO@TiO2" represents a core-shell structure composed of ATO and TiO2, where ATO is the shell and TiO2 is the core; "ATO@mica" represents a core-shell structure composed of ATO and mica, where ATO is the shell and mica is the core; and "ATO@SiO2" represents a core-shell structure composed of ATO and SiO2, where ATO is the shell and SiO2 is the core.

[0066] The conductive powder comprises 0%-50% by mass in the conductive composition. In this case, the light-colored conductive powder content within this range is suitable for spinning and forming.

[0067] The intrinsic antistatic polymer comprises 0%-90% by mass in the conductive composition. In this case, the intrinsic antistatic polymer can be spun into fibers within this range.

[0068] Second composite layer antistatic fiber

[0069] The second type of composite layer antistatic fiber provided by this invention comprises, from the inside out, a core layer, a conductive composition layer, and a sheath layer, with the sheath layer covering the outer side of the conductive composition layer. The core layer is made of a fiber-forming polymer, and the sheath layer is made of a soluble polymer. The core layer, the conductive composition layer, and the sheath layer share a common core axis. In this case, the conductive composition in the core layer and the polymer in the sheath layer have mismatched melt flowability or poor processability, and existing spinning techniques cannot produce light-colored antistatic fibers. However, the method provided in this patent can produce antistatic fibers with superior antistatic properties.

[0070] The outer layer of the fiber can be dissolved in an aqueous solution, an alkaline solution, or a mixture thereof. In this case, by removing the fiber outer layer and retaining only the fiber core and conductive composite layer, a fiber with superior antistatic properties can be obtained.

[0071] The fiber-forming polymer is selected from polyester, polyamide, or compounds or mixtures thereof. In this case, polyester, polyamide, or compounds or mixtures thereof can impart a core skeleton to the fiber, improving the mechanical properties of the fiber and enabling it to meet the requirements of various weaving methods.

[0072] The conductive composition is selected from one or a mixture thereof, including CuI, KI, ATO@TiO2, ATO@mica, ATO@SiO2 nano-conductive powder, or intrinsically antistatic polymers. These components are light-colored nano-inorganic conductive powders, intrinsically antistatic polymers, and mixtures thereof. This claim clarifies the scope of protection and allows for the preparation of light-colored antistatic fibers with good color adaptability. The "@" in "A@B" is typically used to represent a core-shell structure, where A is the shell and B is the core. In this embodiment, the expression "ATO@TiO2" represents a core-shell structure composed of ATO and TiO2, where ATO is the shell and TiO2 is the core; "ATO@mica" represents a core-shell structure composed of ATO and mica, where ATO is the shell and mica is the core; and "ATO@SiO2" represents a core-shell structure composed of ATO and SiO2, where ATO is the shell and SiO2 is the core.

[0073] The conductive powder comprises 0%-50% by mass in the conductive composition. In this case, the light-colored conductive powder content within this range is suitable for spinning and forming.

[0074] The intrinsic antistatic polymer comprises 0%-90% by mass in the conductive composition. In this case, the intrinsic antistatic polymer can be spun into fibers within this range.

[0075] Method for producing first composite layer antistatic fiber

[0076] The method for preparing the first composite layer antistatic fiber provided by the present invention includes the following steps:

[0077] Step S1: Prepare the conductive composition intermediate product;

[0078] Step S2: Prepare composite layer antistatic fiber by composite spinning process, such that the composite layer antistatic fiber includes a core layer, a conductive composition layer and a sheath layer from the inside to the outside, and the core layer, the conductive composition layer and the sheath layer have a common core axis;

[0079] Step S3: Dissolve and remove the outer layer to obtain composite antistatic fiber.

[0080] In this case, the preparation of the conductive composition intermediate product facilitates the subsequent molding and processing of the conductive composition of the fiber intermediate layer, and the fiber with the composite layer structure is processed by composite spinning, and the skin of the composite fiber helps to ensure the integrity of the core layer and the conductive composition layer.

[0081] The preparation of the conductive composition intermediate product specifically includes the following steps:

[0082] A fiber-forming polymer, a conductive component, a dispersant, and an antioxidant are mixed to obtain a homogeneous conductive composition, wherein the amount of dispersant added is 0.5%-3.0% of the mass percentage of the conductive composition, and the amount of antioxidant added is 0.1%-1.0% of the mass percentage of the conductive composition.

[0083] The conductive composition is granulated to obtain an intermediate product of the conductive composition.

[0084] In this case, the conductive composite intermediate product, which consists of multiple components containing conductive elements, facilitates subsequent spinning processing as a single conductive composition.

[0085] The dispersant is selected from one or a mixture of several of ethylene bis-stearamide, ethylene bis-oleamide, ethylene bis-lauramide, hexamethylene bis-dodecyl stearamide, polyamide wax, ethylene bis-dodecyl stearamide, and hydroxyethyl ethylene bis-stearamide. In this case, the dispersant is mainly used to improve the compatibility between the conductive nanoparticles and the fiber-forming polymers and intrinsically antistatic polymers, and to improve the dispersion uniformity.

[0086] The antioxidant is selected from hindered phenolic antioxidants, including one or a mixture of several of 1010, 1076, 1098, 1035, and 168. In this case, the antioxidant mainly improves the heat and oxygen aging resistance of the fiber-forming polymer, thereby extending the service life of the material.

[0087] In the step of granulating the conductive composition to obtain an intermediate product, the granulation temperature is 200℃-290℃ and the granulator speed is 50rpm-300rpm. Under these processing conditions, the composite antistatic fiber provided in this embodiment of the invention has good subsequent processability.

[0088] In this process, composite-layer antistatic fibers are prepared through a composite spinning process. These fibers consist of a core layer, a conductive composition layer, and a sheath layer, from the inside out. The core layer, conductive composition layer, and sheath layer share a common core axis. The composite spinning method used is melt composite spinning. In this case, the composite-layer antistatic fiber has a fiber-forming polymer core layer, a conductive composition middle layer, and a soluble fiber-forming polymer sheath layer. This structural design improves the fiber-forming processability of the conductive composition. The preparation method for antistatic fibers is composite spinning, and more specifically, melt composite spinning, where the sheath layer, conductive composition layer, and core layer can be melt-processed.

[0089] In the melt composite spinning step, the mass ratio of the core fiber-forming polymer, the conductive composite intermediate product, and the soluble polymer is (3-6):(2-7):(1-3), and the spinning speed is 300m / min-4000m / min. Under these conditions, adjusting the mass ratio of the sheath to the core layer within a suitable range ensures good fiber-forming processability.

[0090] In this process, the fineness and / or volume resistivity of the composite antistatic fiber can be adjusted by regulating the types and mass ratios of the components in the sheath, conductive composition layer, and core layer. In this case, by precisely controlling the types and mass ratios of the components in the sheath, conductive composition layer, and core layer, the resulting composite antistatic fiber can have a set fineness and / or volume resistivity.

[0091] Method for producing second composite layer antistatic fiber

[0092] The method for preparing composite layer antistatic fibers provided by the present invention includes the following steps:

[0093] Step S1: Prepare the conductive composition intermediate product;

[0094] Step S2: Prepare composite layer antistatic fiber by composite spinning process, such that the composite layer antistatic fiber includes a core layer, a conductive composition layer and a sheath layer from the inside to the outside, and the core layer, the conductive composition layer and the sheath layer have a common core axis.

[0095] In this case, the preparation of the conductive composition intermediate product facilitates the subsequent molding and processing of the conductive composition of the fiber intermediate layer, and the fiber with the composite layer structure is processed by composite spinning, and the skin of the composite fiber helps to ensure the integrity of the core layer and the conductive composition layer.

[0096] The preparation of the conductive composition specifically includes the following steps:

[0097] A fiber-forming polymer, a conductive component, a dispersant, and an antioxidant are mixed to obtain a homogeneous conductive composition, wherein the amount of dispersant added is 0.5%-3.0% of the mass percentage of the conductive composition, and the amount of antioxidant added is 0.1%-1.0% of the mass percentage of the conductive composition.

[0098] The conductive composition is granulated to obtain an intermediate product of the conductive composition.

[0099] In this case, the conductive composite intermediate product, which consists of multiple components containing conductive elements, facilitates subsequent spinning processing as a single conductive composition.

[0100] The dispersant is selected from one or a mixture of several of ethylene bis-stearamide, ethylene bis-oleamide, ethylene bis-lauramide, hexamethylene bis-dodecyl stearamide, polyamide wax, ethylene bis-dodecyl stearamide, and hydroxyethyl ethylene bis-stearamide. In this case, the dispersant is mainly used to improve the compatibility between the conductive nanoparticles and the fiber-forming polymers and intrinsically antistatic polymers, and to improve the dispersion uniformity.

[0101] The antioxidant is selected from hindered phenolic antioxidants, including one or a mixture of several of 1010, 1076, 1098, 1035, and 168. In this case, the antioxidant mainly improves the heat and oxygen aging resistance of the fiber-forming polymer, thereby extending the service life of the material.

[0102] In the step of granulating the conductive composition to obtain an intermediate product, the granulation temperature is 200℃-290℃ and the granulator speed is 50rpm-300rpm. Under these processing conditions, the composite layer antistatic fiber provided in this embodiment of the invention has good subsequent processability.

[0103] In this process, composite-layer antistatic fibers are prepared through a composite spinning process. These fibers consist of a core layer, a conductive composition layer, and a sheath layer, from the inside out. The core layer, conductive composition layer, and sheath layer share a common core axis. The composite spinning method used is melt composite spinning. In this case, the composite-layer antistatic fiber has a fiber-forming polymer core layer, a conductive composition middle layer, and a soluble fiber-forming polymer sheath layer. This structural design improves the fiber-forming processability of the conductive composition. The preparation method for antistatic fibers is composite spinning, and more specifically, melt composite spinning, where the sheath layer, conductive composition layer, and core layer can be melt-processed.

[0104] In the melt composite spinning step, the mass ratio of the core fiber-forming polymer, the conductive composite intermediate product, and the soluble polymer is (3-6):(2-7):(1-3), and the spinning speed is 300m / min-4000m / min. Under these conditions, adjusting the mass ratio of the sheath to the core layer within a suitable range ensures good fiber-forming processability.

[0105] Method for adjusting the denier and / or volume resistivity of first composite layer antistatic fiber

[0106] The first method for adjusting the fineness and / or volume resistivity of composite layer antistatic fibers provided by the present invention includes the following steps:

[0107] In the preparation method of the first composite layer antistatic fiber provided by the present invention, the types and mass ratios of the components of the skin layer, the conductive composition layer, and the core layer are adjusted so that the obtained composite layer antistatic fiber has a set fineness and / or volume resistivity.

[0108] Example 1

[0109] In this embodiment, the concentric circular three-layer structure of antistatic fiber core, conductive composition layer, and sheath layer is prepared with a mass ratio of 5:3:2. The sheath layer of the fiber is a water-soluble polyester. The conductive composition layer consists of nano-light-colored conductive powder, intrinsic antistatic polymer, fiber-forming polymer, and processing aids. In the fiber core layer, the light-colored conductive powder is a mixture of ATO@TiO2 and CuI, with a content of 10 wt%; the intrinsic antistatic polymer content is 60 wt%; the fiber-forming polymer is polyamide, with a content of 27 wt%; the dispersant content is 2.5 wt%; and the antioxidant content is 0.5 wt%.

[0110] The specific steps of the above-mentioned light-colored antistatic fiber preparation process are as follows:

[0111] a. Preparation of the conductive composition: The dried light-colored nano-conductive powder, intrinsic antistatic polymer, polyamide, dispersant, and antioxidant were weighed according to the above mass ratio and mixed at high speed to obtain a uniformly mixed conductive mixture. The conductive mixture was granulated using a twin-screw extruder at a granulation temperature of 240℃.

[0112] b. Preparation of light-colored antistatic fibers: The fiber core polymer, the conductive composition of the fiber middle layer, and the soluble polymer of the fiber sheath are melted and conveyed separately using a screw extruder. The melted polymer is then metered and dispensed into the various spinnerets of a composite spinneret by a metering pump. The fibers are ejected from the spinnerets, cooled and solidified, oiled, guided, and wound to obtain concentric three-layer light-colored antistatic fibers. The mass ratio of the fiber core, middle layer, and sheath is 5:3:2, and the spinning speed is 2000 m / min.

[0113] This yielded a light-colored antistatic fiber with a three-layer structure of 100 dtex / 12f. Subsequently, the fiber sheath was removed by dissolving it in an aqueous solution at 60°C, resulting in a light-colored antistatic fiber with a concentric circular double-layer structure containing a core skeleton and an intermediate conductive layer. The fiber length resistivity was 7.7 × 10⁻⁶. 8 Ω / cm, tensile strength 3.25cN / dtex, fineness 80dtex, meeting the requirements of various weaving methods.

[0114] Example 2

[0115] In this embodiment, the concentric circular three-layer antistatic fiber core, intermediate layer, and sheath are prepared with a mass ratio of 4:5:1. The sheath of the fiber is a water-soluble polyester. The intermediate layer consists of nano-light-colored conductive powder, an intrinsic antistatic polymer, a fiber-forming polymer, and processing aids. In the fiber core, the light-colored conductive powder is a mixture of ATO@TiO2 and KI, with a content of 20 wt%; the intrinsic antistatic polymer content is 50 wt%; the fiber-forming polymer is polyamide, with a content of 27 wt%; the dispersant content is 2.4 wt%; and the antioxidant content is 0.6 wt%.

[0116] The specific steps of the above-mentioned light-colored antistatic fiber preparation process are as follows:

[0117] a. Preparation of the conductive composition: The dried light-colored nano-conductive powder, intrinsic antistatic polymer, polyamide, dispersant, and antioxidant were weighed according to the above mass ratio and mixed at high speed to obtain a uniformly mixed conductive mixture. The conductive mixture was granulated using a twin-screw extruder at a granulation temperature of 240℃.

[0118] b. Preparation of light-colored antistatic fibers: The fiber core polymer, the conductive composition of the fiber middle layer, and the soluble polymer of the fiber sheath are melted and conveyed separately using a screw extruder. The melted polymer is then metered and dispensed into the various spinnerets of a composite spinneret by a metering pump. The fibers are ejected from the spinnerets, cooled and solidified, oiled, guided, and wound to obtain concentric three-layer light-colored antistatic fibers. The mass ratio of the fiber core, middle layer, and sheath is 4:5:1, and the spinning speed is 2000 m / min.

[0119] This yielded a light-colored antistatic fiber with a three-layer structure of 100 dtex / 12f. Subsequently, the fiber sheath was removed by dissolving it in an aqueous solution at 60°C, resulting in a light-colored antistatic fiber with a concentric circular double-layer structure containing a core skeleton and an intermediate conductive layer. The fiber length resistivity was 2.1 × 10⁻⁶. 8 Ω / cm, tensile strength 3.13cN / dtex, fineness 90dtex, meeting the requirements of various weaving methods.

[0120] Example 3

[0121] In this embodiment, the concentric circular three-layer structure of antistatic fiber, consisting of a core layer, an intermediate layer, and a sheath, has a mass ratio of 3:4:3. The sheath of this fiber is a water-soluble polyester. The intermediate layer is composed of nano-light-colored conductive powder, an intrinsic antistatic polymer, a fiber-forming polymer, and processing aids. In the core layer, the light-colored conductive powder is a mixture of ATO@SiO2 and KI, with a content of 30 wt%; the intrinsic antistatic polymer content is 40 wt%; the fiber-forming polymer is polyamide, with a content of 27 wt%; the dispersant content is 2.5 wt%; and the antioxidant content is 0.5 wt%.

[0122] The specific steps of the above-mentioned light-colored antistatic fiber preparation process are as follows:

[0123] a. Preparation of the conductive composition: The dried light-colored nano-conductive powder, intrinsic antistatic polymer, polyamide, dispersant, and antioxidant were weighed according to the above mass ratio and mixed at high speed to obtain a uniformly mixed conductive mixture. The conductive mixture was granulated using a twin-screw extruder at a granulation temperature of 240℃.

[0124] b. Preparation of light-colored antistatic fibers: The fiber core polymer, the conductive composition of the fiber middle layer, and the soluble polymer of the fiber sheath are melted and conveyed separately using a screw extruder. The melted polymer is then metered and dispensed into the various spinnerets of a composite spinneret by a metering pump. The fibers are ejected from the spinnerets, cooled and solidified, oiled, guided, and wound to obtain concentric three-layer light-colored antistatic fibers. The mass ratio of the fiber core, middle layer, and sheath is 3:4:3, and the spinning speed is 2000 m / min.

[0125] This yielded a light-colored antistatic fiber with a three-layer structure of 100 dtex / 12f. Subsequently, the fiber sheath was removed by dissolving it in an aqueous solution at 60°C, resulting in a light-colored antistatic fiber with a concentric circular double-layer structure containing a core skeleton and an intermediate conductive layer. The fiber length resistivity was 3.8 × 10⁻⁶. 8 Ω / cm, tensile strength 2.62cN / dtex, fineness 70dtex, meeting the requirements of various weaving methods.

[0126] Example 4

[0127] In this embodiment, the concentric circular three-layer antistatic fiber core, intermediate layer, and sheath are prepared with a mass ratio of 3:5:2. The sheath of the fiber is an alkali-soluble polyester. The intermediate layer consists of nano-light-colored conductive powder, an intrinsic antistatic polymer, a fiber-forming polymer, and processing aids. In the fiber core, the light-colored conductive powder is a mixture of ATO@mica and ATO@TiO2, with a content of 40 wt%; the intrinsic antistatic polymer content is 30 wt%; the fiber-forming polymer is polyester, with a content of 27 wt%; the dispersant content is 2.5 wt%; and the antioxidant content is 0.5 wt%.

[0128] The specific steps of the above-mentioned light-colored antistatic fiber preparation process are as follows:

[0129] a. Preparation of the conductive composition: The dried light-colored nano-conductive powder, intrinsic antistatic polymer, polyester, dispersant, and antioxidant were weighed according to the above mass ratio and mixed at high speed to obtain a uniformly mixed conductive mixture. The conductive mixture was granulated using a twin-screw extruder at a granulation temperature of 260℃.

[0130] b. Preparation of light-colored antistatic fibers: The fiber core polymer, the conductive composition of the fiber middle layer, and the soluble polymer of the fiber sheath are melted and conveyed separately using a screw extruder. The melted polymer is then metered and dispensed into the various spinnerets of a composite spinneret by a metering pump. The fibers are ejected from the spinnerets, cooled and solidified, oiled, guided, and wound to obtain concentric three-layer light-colored antistatic fibers. The mass ratio of the fiber core, middle layer, and sheath is 3:5:2, and the spinning speed is 2000 m / min.

[0131] This yielded a light-colored antistatic fiber with a three-layer structure of 100 dtex / 12f. Subsequently, the fiber sheath was removed by dissolving it in an alkaline solution at 70°C, resulting in a light-colored antistatic fiber with a concentric circular double-layer structure containing a core skeleton and an intermediate conductive layer. The fiber length resistivity was 3.1 × 10⁻⁶. 8 Ω / cm, tensile strength 2.89cN / dtex, fineness 80dtex, meeting the requirements of various weaving methods.

[0132] Example 5

[0133] In this embodiment, the concentric circular three-layer antistatic fiber core, intermediate layer, and sheath have a mass ratio of 2:6:2, and the sheath is an alkali-soluble polyester. The intermediate layer consists of nano-light-colored conductive powder, an intrinsic antistatic polymer, a fiber-forming polymer, and processing aids. In the core layer, the light-colored conductive powder is a mixture of ATO@mica and ATO@TiO2, with a content of 40 wt%; the intrinsic antistatic polymer content is 30 wt%; the fiber-forming polymer is polyester, with a content of 27 wt%; the dispersant content is 2.5 wt%; and the antioxidant content is 0.5 wt%.

[0134] The specific steps of the above-mentioned light-colored antistatic fiber preparation process are as follows:

[0135] a. Preparation of the conductive composition: The dried light-colored nano-conductive powder, intrinsic antistatic polymer, polyester, dispersant, and antioxidant were weighed according to the above mass ratio and mixed at high speed to obtain a uniformly mixed conductive mixture. The conductive mixture was granulated using a twin-screw extruder at a granulation temperature of 260℃.

[0136] b. Preparation of light-colored antistatic fibers: The fiber core polymer, the conductive composition of the fiber middle layer, and the soluble polymer of the fiber sheath are melted and conveyed separately using a screw extruder. The melted polymer is then metered and dispensed into the various spinnerets of a composite spinneret by a metering pump. The fibers are ejected from the spinnerets, cooled and solidified, oiled, guided, and wound to obtain concentric three-layer light-colored antistatic fibers. The mass ratio of the fiber core, middle layer, and sheath is 2:6:2, and the spinning speed is 2000 m / min.

[0137] This yielded a light-colored antistatic fiber with a three-layer structure of 100 dtex / 12f. Subsequently, the fiber sheath was removed by dissolving it in an alkaline solution at 70°C, resulting in a light-colored antistatic fiber with a concentric circular double-layer structure containing a core skeleton and an intermediate conductive layer. The fiber length resistivity was 1.7 × 10⁻⁶. 8 The fiber exhibits a tensile strength of 2.46 cN / dtex and a fineness of 80 dtex, with a core layer content of Ω / cm. It can be seen that when the core layer skeleton content is less than 30%, the fiber's mechanical properties decrease, only meeting the requirements of some weaving methods. Therefore, a core layer content of ≥30% is preferable.

[0138] Example 6

[0139] In this embodiment, the concentric circular three-layer antistatic fiber core, intermediate layer, and sheath have a mass ratio of 6:1:3, and the sheath is an alkali-soluble polyester. The intermediate layer consists of nano-light-colored conductive powder, an intrinsic antistatic polymer, a fiber-forming polymer, and processing aids. In the core layer, the light-colored conductive powder is a mixture of ATO@mica and ATO@TiO2, with a content of 40 wt%; the intrinsic antistatic polymer content is 30 wt%; the fiber-forming polymer is polyester, with a content of 27 wt%; the dispersant content is 2.5 wt%; and the antioxidant content is 0.5 wt%.

[0140] The specific steps of the above-mentioned light-colored antistatic fiber preparation process are as follows:

[0141] a. Preparation of the conductive composition: The dried light-colored nano-conductive powder, intrinsic antistatic polymer, polyester, dispersant, and antioxidant were weighed according to the above mass ratio and mixed at high speed to obtain a uniformly mixed conductive mixture. The conductive mixture was granulated using a twin-screw extruder at a granulation temperature of 260℃.

[0142] b. Preparation of light-colored antistatic fibers: The fiber core polymer, the conductive composition of the fiber middle layer, and the soluble polymer of the fiber sheath are melted and conveyed separately using a screw extruder. The melted polymer is then metered and dispensed into the various spinnerets of a composite spinneret by a metering pump. The fibers are ejected from the spinnerets, cooled and solidified, oiled, guided, and wound to obtain concentric three-layer light-colored antistatic fibers. The mass ratio of the fiber core, middle layer, and sheath is 6:1:3, and the spinning speed is 2000 m / min.

[0143] This yielded a light-colored antistatic fiber with a three-layer structure of 100 dtex / 12f. Subsequently, the fiber sheath was removed by dissolving it in an alkaline solution at 70°C, resulting in a light-colored antistatic fiber with a concentric circular double-layer structure containing a core skeleton and an intermediate conductive layer. The fiber length resistivity was 5.4 × 10⁻⁶. 9 The fiber exhibits a tensile strength of 3.49 cN / dtex and a fineness of 80 dtex, with a strength of Ω / cm. It can be seen that the antistatic properties of the fiber decrease when the content of the conductive interlayer composition is less than 20%. Therefore, an interlayer content of ≥20% is preferable.

[0144] Example 7

[0145] In this embodiment, the concentric circular three-layer structure antistatic fiber core, intermediate layer, and sheath are prepared with a mass ratio of 3:5:2. The sheath of the fiber is a water-soluble polyester. The intermediate layer is composed of nano-light-colored conductive powder, a fiber-forming polymer, and processing aids. In the core layer, the light-colored conductive powder is ATO@TiO2 with a content of 50 wt%, the fiber-forming polymer is polyamide with a content of 47 wt%, the dispersant content is 2.6 wt%, and the antioxidant content is 0.4 wt%.

[0146] The specific steps of the above-mentioned light-colored antistatic fiber preparation process are as follows:

[0147] a. Preparation of the conductive composition: The dried light-colored nano-conductive powder, polyamide, dispersant, and antioxidant were weighed according to the above mass ratio and mixed at high speed to obtain a uniformly mixed conductive mixture. The conductive mixture was granulated using a twin-screw extruder at a granulation temperature of 240℃.

[0148] b. Preparation of light-colored antistatic fibers: The fiber core polymer, the conductive composition of the fiber middle layer, and the soluble polymer of the fiber sheath are melted and conveyed separately using a screw extruder. The melted polymer is then metered and dispensed into the various spinnerets of a composite spinneret by a metering pump. The fibers are ejected from the spinnerets, cooled and solidified, oiled, guided, and wound to obtain concentric three-layer light-colored antistatic fibers. The mass ratio of the fiber core, middle layer, and sheath is 3:5:2, and the spinning speed is 2000 m / min.

[0149] This yielded a light-colored antistatic fiber with a three-layer structure of 100 dtex / 12f. Subsequently, the fiber sheath was removed by dissolving it in an aqueous solution at 60°C, resulting in a light-colored antistatic fiber with a concentric circular double-layer structure containing a core skeleton and an intermediate conductive layer. The fiber length resistivity was 8.6 × 10⁻⁶. 8 Ω / cm, tensile strength 2.52cN / dtex, fineness 80dtex, meeting the requirements of various weaving methods.

[0150] Example 8

[0151] In this embodiment, the concentric circular three-layer antistatic fiber core, intermediate layer, and sheath are prepared with a mass ratio of 3:5:2. The sheath of the fiber is a water-soluble polyester. The intermediate layer is composed of an intrinsic antistatic polymer, a fiber-forming polymer, and processing aids. The core layer contains 70 wt% intrinsic antistatic polymer, 27 wt% polyamide as the fiber-forming polymer, 2.5 wt% dispersant, and 0.5 wt% antioxidant.

[0152] The specific steps of the above-mentioned light-colored antistatic fiber preparation process are as follows:

[0153] a. Preparation of the conductive composition: The dried intrinsic antistatic polymer, polyamide, dispersant, and antioxidant were weighed according to the above mass ratio and mixed at high speed to obtain a homogeneous conductive mixture. The conductive mixture was granulated using a twin-screw extruder at a granulation temperature of 240℃.

[0154] b. Preparation of light-colored antistatic fibers: The fiber core polymer, the conductive composition of the fiber middle layer, and the soluble polymer of the fiber sheath are melted and conveyed separately using a screw extruder. The melted polymer is then metered and dispensed into the various spinnerets of a composite spinneret by a metering pump. The fibers are ejected from the spinnerets, cooled and solidified, oiled, guided, and wound to obtain concentric three-layer light-colored antistatic fibers. The mass ratio of the fiber core, middle layer, and sheath is 3:5:2, and the spinning speed is 2000 m / min.

[0155] This yielded a light-colored antistatic fiber with a three-layer structure of 100 dtex / 12f. Subsequently, the fiber sheath was removed by dissolving it in an aqueous solution at 60°C, resulting in a light-colored antistatic fiber with a concentric circular double-layer structure containing a core skeleton and an intermediate conductive layer. The fiber length resistivity was 8.1 × 10⁻⁶. 7 Ω / cm, tensile strength 2.96cN / dtex, fineness 80dtex, meeting the requirements of various weaving methods.

[0156] The fiber production yield of the above embodiments was compared, and the results are shown in Table 1.

[0157] Table 1 compares the fiber yield of the embodiments.

[0158]

[0159]

[0160] It can be seen that by using the method provided in this patent to prepare light-colored antistatic fibers and removing the soluble fiber-forming polymer from the fiber sheath through hydrothermal or alkaline water treatment, light-colored antistatic fibers containing only the fiber core structure can be prepared, which solves the problem of poor spinnability of light-colored antistatic compositions and the inability to spin into filaments.

[0161] The composite layer antistatic fiber provided by this invention, its preparation method, and its fineness and / or volume resistivity adjustment method have the following technical advantages:

[0162] First, compared with antistatic fibers prepared using traditional dark conductive components such as carbon black, carbon nanotubes and graphene, the light-colored antistatic fibers prepared by using light-colored nano-conductive powders or intrinsic antistatic polymers as conductive functional components of light-colored antistatic fibers have the advantages of light-colored fiber color and dyeability.

[0163] Second, the light-colored antistatic fiber is prepared using the method provided in this patent, and the soluble fiber-forming polymer of the fiber skin is removed by hydrothermal or alkaline water treatment to prepare a light-colored antistatic fiber with a concentric double-layer structure containing a core skeleton and an intermediate conductive composition, which solves the problem that the light-colored antistatic composition has poor spinnability and cannot be spun into shape.

[0164] Third, by providing a skeleton to the fiber core layer, the mechanical properties of the fiber are improved, enabling it to meet the requirements of various weaving methods;

[0165] Fourth, by precisely controlling the content of light-colored conductive powder, intrinsic antistatic polymer, and the mass ratio of the three-layer structure in the conductive composition, the fineness and volume resistivity of the light-colored antistatic fiber can be adjusted, and the final light-colored antistatic fiber has good antistatic and mechanical properties.

[0166] In summary, the light-colored antistatic fiber prepared using the melt composite spinning technology of this patent has excellent antistatic properties, the preparation process is relatively simple, and the prepared light-colored antistatic fiber has broad application prospects in the fields of civil textiles, home textiles, microelectronics, medicine, and precision instruments.

[0167] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0168] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A composite layer antistatic fiber, characterized in that, From the inside out, it includes a core layer and a conductive composition layer, wherein, The core layer is made of a fiber-forming polymer and has a common core axis with the conductive composition layer.

2. The composite layer antistatic fiber according to claim 1, characterized in that, The fiber-forming polymer is selected from one of polyesters and polyamide polymers, or compounds or mixtures thereof; Preferably, the conductive composition is selected from one or a mixture thereof, including CuI, KI, ATO@TiO2, ATO@mica, ATO@SiO2 nanoconductive powder or intrinsic antistatic polymer; Preferably, the conductive powder has a mass percentage content of 0%-50% in the conductive composition; Preferably, the intrinsic antistatic polymer in the conductive composition has a mass percentage of 0%-90%.

3. A composite layer antistatic fiber, characterized in that, From the inside out, it includes a core layer, a conductive composition layer, and a skin layer, wherein the skin layer covers the outside of the conductive composition layer. The core layer is made of a fiber-forming polymer, and the sheath layer is made of a soluble polymer; The core layer, the conductive composition layer, and the skin layer have a common core axis.

4. The composite layer antistatic fiber according to claim 3, characterized in that, The skin is made of water-soluble or alkali-soluble polyester, which can dissolve in one or a mixture of aqueous or alkaline solutions; Preferably, the fiber-forming polymer is selected from polyester, polyamide polymer, or compounds or mixtures thereof; Preferably, the conductive composition is selected from one or a mixture thereof, including CuI, KI, ATO@TiO2, ATO@mica, ATO@SiO2 nanoconductive powder or intrinsic antistatic polymer; Preferably, the conductive powder has a mass percentage content of 0%-50% in the conductive composition; Preferably, the intrinsic antistatic polymer in the conductive composition has a mass percentage of 0%-90%.

5. The method for preparing the composite layer antistatic fiber according to any one of claims 1-2, characterized in that, Includes the following steps: Preparation of intermediate products for conductive compositions; The composite antistatic fiber is prepared by a composite spinning process, such that the composite antistatic fiber includes a core layer, a conductive composition layer and a sheath layer from the inside out, and the core layer, the conductive composition layer and the sheath layer have a common core axis. The outer layer is dissolved and removed to obtain the composite antistatic fiber.

6. The method for preparing composite layer antistatic fibers according to claim 5, characterized in that, The preparation of the intermediate product of the conductive composition specifically includes the following steps: The fiber-forming polymer, conductive component, dispersant, and antioxidant are mixed to obtain a homogeneous conductive composition, wherein the amount of dispersant added is 0.5%-3.0% of the mass percentage of the conductive composition, and the amount of antioxidant added is 0.1%-1.0% of the mass percentage of the conductive composition. The conductive composition is granulated to obtain an intermediate product of the conductive composition. Preferably, the dispersant is selected from one or a mixture of several of ethylene bis-stearamide, ethylene bis-oleamide, ethylene bis-lauramide, hexamethylene bis-dodecyl stearamide, polyamide wax, ethylene bis-dodecyl stearamide, and hydroxyethyl ethylene bis-stearamide; Preferably, the antioxidant is selected from hindered phenolic antioxidants, including one or a mixture of several of 1010, 1076, 1098, 1035, and 168; Preferably, in the step of granulating the conductive composition to obtain the intermediate product of the conductive composition, the granulation temperature is 200℃-290℃ and the granulator speed is 50rpm-300rpm. Preferably, the composite antistatic fiber is prepared by a composite spinning process, wherein the composite antistatic fiber comprises a core layer, a conductive composition layer and a sheath layer from the inside out, and the core layer, the conductive composition layer and the sheath layer have a common core axis. In the step of preparing the composite spinning process, the composite spinning method is melt composite spinning. Preferably, during the melt composite spinning step, the mass ratio between the core fiber-forming polymer, the conductive composition intermediate product, and the soluble polymer is (3-6):(2-7):(1-3), and the spinning speed is 300m / min-4000m / min. Preferably, the fineness and / or volume resistivity of the antistatic fibers in the composite layer can be adjusted by regulating the types and mass ratios of the components in the skin layer, conductive composition layer, and core layer.

7. The method for adjusting the fineness and / or volume resistivity of the composite layer antistatic fiber according to any one of claims 1-2, characterized in that, Includes the following steps: In the process of preparing the composite layer antistatic fiber according to any one of claims 5-6, the types and mass ratios of the components of the skin layer, the conductive composition layer, and the core layer are adjusted so that the resulting composite layer antistatic fiber has a set fineness and / or volume resistivity.

8. The method for preparing the composite layer antistatic fiber according to any one of claims 3-4, characterized in that, Includes the following steps: Preparation of intermediate products for conductive compositions; The composite antistatic fiber is prepared by a composite spinning process, such that the composite antistatic fiber includes a core layer, a conductive composition layer and a sheath layer from the inside out, and the core layer, the conductive composition layer and the sheath layer have a common core axis.

9. The method for preparing composite layer antistatic fibers according to claim 8, characterized in that, The preparation of the conductive composition specifically includes the following steps: The fiber-forming polymer, conductive component, dispersant, and antioxidant are mixed to obtain a homogeneous conductive composition, wherein the amount of dispersant added is 0.5%-3.0% of the mass percentage of the conductive composition, and the amount of antioxidant added is 0.1%-1.0% of the mass percentage of the conductive composition. The conductive composition is granulated to obtain an intermediate product of the conductive composition.

10. The method for preparing composite layer antistatic fibers according to claim 9, characterized in that, The dispersant is selected from one or a mixture of several of ethylene bis-stearamide, ethylene bis-oleamide, ethylene bis-lauramide, hexamethylene bis-dodecyl stearamide, polyamide wax, ethylene bis-dodecyl stearamide, and hydroxyethyl ethylene bis-stearamide; Preferably, the antioxidant is selected from hindered phenolic antioxidants, including one or a mixture of several of 1010, 1076, 1098, 1035, and 168; Preferably, in the step of granulating the conductive composition to obtain the intermediate product of the conductive composition, the granulation temperature is 200℃-290℃ and the granulator speed is 50rpm-300rpm. Preferably, the composite antistatic fiber is prepared by a composite spinning process, wherein the composite antistatic fiber comprises a core layer, a conductive composition layer and a sheath layer from the inside out, and the core layer, the conductive composition layer and the sheath layer have a common core axis. In the step of preparing the composite spinning process, the composite spinning method is melt composite spinning. Preferably, in the melt composite spinning step, the mass ratio between the core fiber-forming polymer, the conductive composition intermediate product, and the soluble polymer is (3-6):(2-7):(1-3), and the spinning speed is 300m / min-4000m / min.

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