Antistatic flame-retardant continuous fiber reinforced casting nylon

Abstract

The invention discloses antistatic flame-retardant continuous fiber reinforced casting nylon and a preparation method thereof. The cast nylon comprises a composition and continuous fibers, and the mass of the continuous fibers accounts for 50-95% of the total mass of the cast nylon; the mass of the composition accounts for 5-50% of the total mass of the casting nylon; the composition is formed by in-situ polymerization of lactam and corresponding amino acid monomers and a modified additive, the modified additive mainly comprises a nano material, modified carbon black, an organophosphorus flame retardant, a basic catalyst, a cocatalyst and other auxiliaries. The raw materials for casting nylon are treated, so that the strength of the raw materials is improved, and meanwhile, the antistatic property and flame retardance of the casting nylon can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cast nylon, and specifically, to an antistatic and flame-retardant continuous fiber-reinforced cast nylon. Background Art

[0002] A composite material is a macroscopic combination of two or more immiscible materials. The composite material is composed of at least a matrix material forming a continuous phase for structural bonding and a reinforcing material having various structures for mechanical properties. Compared with thermosetting composite materials, thermoplastic composite materials have the advantages of high fracture toughness, strong impact resistance, recyclability, high production efficiency, unlimited storage period, and convenient welding repair, and are the preferred materials for future thermoplastic composite materials.

[0003] Due to different matrix materials, composite materials are divided into thermosetting composite materials and thermoplastic composite materials. Although thermosetting composite materials have been developed earlier, they have the disadvantages of poor weather resistance and toughness. Once cracks appear in the products, it is almost difficult to repair them, and the reuse rate is low; moreover, the matrix of thermosetting composite materials is not easy to be formed into other forms. Once the polymer is cured, the shape is fixed, which makes the thermosetting composite materials unable to be repeatedly processed and formed later and difficult to be recycled and reused, thus causing serious environmental and cost-benefit problems.

[0004] Among them, monomer casting nylon (MC) is a new type of engineering plastic developed in the 1960s. Using caprolactam as the main raw material, it is directly cast into a mold preheated to a certain temperature by anionic polymerization under normal pressure. And cast nylon has many unique properties such as light weight, self-lubrication, and wear resistance. The cast nylon-based fiber thermoplastic composite material prepared by fiber reinforcement can effectively improve its mechanical properties such as tensile strength and bending strength, and realize "replacing steel with plastic" in many fields.

[0005] However, different application fields have different requirements. For example, for instrument enclosures, tracks, etc. used in explosive environments such as coal mines, in addition to requiring the material to have high strength comparable to that of metals, it is also required that the material has multifunctional properties such as flame retardancy and antistatic property. Summary of the Invention

[0006] The present application provides an antistatic and flame-retardant continuous fiber-reinforced cast nylon and a preparation method thereof. The present application treats the raw materials of cast nylon, which can not only improve its strength, but also improve the antistatic property and flame retardancy of cast nylon.

[0007] An antistatic and flame-retardant continuous fiber reinforced cast nylon provided by the present application, wherein the raw materials of the cast nylon include a composition and continuous fibers, and the mass of the continuous fibers accounts for 50-95% of the total mass of the cast nylon; the mass of the composition accounts for 5%-50% of the total mass of the cast nylon; the composition is formed by in-situ polymerization of lactam and its corresponding amino acid monomers and modified additives; the modified additives mainly include nanomaterials, modified carbon black, organophosphorus flame retardants, basic catalysts, cocatalysts and other auxiliaries; the continuous fibers include one or more of glass fibers, carbon fibers, basalt fibers or aramid fibers.

[0008] Preferably, the basic catalyst includes one or several combinations of sodium hydroxide, sodium caprolactamate, magnesium bromide caprolactamate, metallic sodium, metallic potassium, metallic lithium, sodium alkoxide, Grignard reagent, etc.; the mass of the basic catalyst accounts for 0.1-2% of the mass of the composition.

[0009] Preferably, the cocatalyst includes hexamethylene-1,6-diformylcaprolactam, acetylcaprolactam isocyanate compound or a combination thereof; the mass of the cocatalyst accounts for 0.1-2% of the mass of the composition.

[0010] Preferably, the isocyanate compound includes toluene-2,4-diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate.

[0011] Preferably, the isocyanate compound includes toluene-2,4-diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate.

[0012] Preferably, the other auxiliaries include antioxidants and mold release agents, etc.; the mass of the other auxiliaries accounts for 0.1-2% of the mass of the composition.

[0013] Preferably, the nanomaterials include one or more of aminated montmorillonite, aminated carbon nanotubes, aminated silica; the mass of the nanomaterials accounts for 0.1-3% of the mass of the composition.

[0014] On the other hand, the present application provides a preparation method of an antistatic and flame-retardant continuous fiber reinforced cast nylon, which is characterized by including the following steps:

[0015] S1: Divide a certain weight portion of lactam or its corresponding amino acid monomer into two equal parts and add them to reaction kettles A and B, then heat to melt. Add a certain amount of nanomaterials, modified carbon black, organophosphorus flame retardant, and other additives to reaction kettle A according to a ratio, and perform vacuum dehydration. Then add a certain proportion of alkaline catalyst, maintain the temperature at 110 - 150 °C, and continue vacuum dehydration for 5 - 45 min to obtain the active ingredient A component. S2: Heat and perform vacuum dehydration for 5 - 15 min in reaction kettle B, then add a certain proportion of cocatalyst, maintain the temperature at 120 - 145 °C, and perform vacuum dehydration for 5 - 45 min to obtain the active ingredient B component. S3: Lead the continuous fiber out from the yarn frame, arrange it through the beam plate, and enter the preheated impregnation mold. The preheating temperature of the impregnation mold is 120 - 180 °C. Then mix the above-mentioned active ingredient A component and active ingredient B component evenly to obtain a molten mixture and pour it into the impregnation mold. Maintain the temperature in the impregnation mold at 120 - 180 °C and react for 1 - 10 min to obtain the antistatic and flame-retardant continuous fiber reinforced cast nylon composite material.

[0016] Preferably, the modified carbon black refers to the carbon black treated with silane coupling agent; the mass of the modified carbon black accounts for 0.1 - 5% of the mass of the composition.

[0017] Preferably, the chemical formula of the silane coupling agent is: R - Si - X3, where X is a hydrolyzable functional group, which can be chloro group, methoxy group, ethoxy group, acetoxy group, etc.; Y is an organic functional group, such as vinyl group, amino group, epoxy group, methacryloxy group, mercapto group, or ureido group.

[0018] Preferably, the organophosphorus flame retardant includes one or more of organophosphorus flame retardants including hexaphenoxycyclotriphosphazene and its cyclic phosphazene derivatives, phenoxypolyphosphazene and its polyphosphazene derivatives; the mass of the organophosphorus flame retardant accounts for 1 - 30% of the mass of the composition.

[0019] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0020] 1. The antistatic and flame-retardant continuous fiber reinforced cast nylon of the present invention application has excellent flame retardant performance and outstanding antistatic performance at the same time. Due to the synergistic flame retardant mechanism of the organophosphorus flame retardant / nanomaterials, the flame retardant grade of the material is higher, the dosage of the organophosphorus flame retardant is less, and the impact on the mechanical properties of the material is smaller.

[0021] 2. The antistatic and flame-retardant continuous fiber reinforced cast nylon of the present invention application has enhanced antioxidant ability due to the excellent barrier performance and char-forming performance of the nanomaterials, and thus has excellent functions such as heat insulation and oxygen isolation, achieving the purpose of synergistically enhancing the flame retardant performance.

[0022] 3. The antistatic and flame-retardant continuous fiber-reinforced cast nylon of the present invention application uses a silane coupling agent to modify carbon black, making its surface active. Therefore, the modified carbon black can be evenly dispersed in the matrix during the preparation of the composite material, achieving excellent antistatic performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a sample made of cast nylon in the embodiment of the present invention application;

[0025] Figure 2 It is a sample made of cast nylon in the embodiment of the present invention application;

[0026] Figure 3 It is a sample made of cast nylon in the embodiment of the present invention application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The present application provides an antistatic and flame-retardant continuous fiber-reinforced cast nylon and its preparation method. On the one hand, carbon black is modified by a silane coupling agent, so that the surface of the carbon black has polar groups, making the carbon black have a certain activity, thereby reducing the agglomeration and sedimentation problems of the carbon black, improving the dispersion degree of the carbon black in the molten mixture, making it have good compatibility with other components, and thus greatly improving the antistatic performance of the continuous fiber-reinforced cast nylon, with the surface resistance reaching 106Ω; on the other hand, due to the excellent barrier and char-forming effects of the nanomaterials, they synergistically flame-retard with the organophosphorus-based flame retardant, enabling the continuous fiber-reinforced cast nylon to achieve a flame-retardant performance of UL 94V-0 while maintaining its mechanical properties.

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0029] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or server comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or modules not clearly listed or inherent to these processes, methods, products or devices.

[0030] Preparation Examples of Raw Materials and / or Intermediates

[0031] Raw Materials: The raw materials and intermediates used in the examples can all be obtained commercially.

[0032] Examples

[0033] Example 1

[0034] S1: Divide 1654 g of caprolactam into two equal parts and add them to reaction kettles A and B respectively, and heat to melt; remove water under vacuum, control the temperature within 130 °C, the vacuum degree ≥ 0.996 bar, and the time is 5 min. Add 20 g of nano-material amino-montmorillonite, 100 g of modified carbon black (treated with KH550), 200 g of organophosphorus flame retardant hexaphenoxycyclotriphosphazene and 20 g of other additives (including antioxidant 1098, antioxidant 168, demolding agent - stearic acid) to reaction kettle A, and carry out vacuum dehydration for 15 min, then add 4 g of sodium hydroxide, keep at 150 °C, and continue vacuum dehydration for 20 min to obtain the active material component A;

[0035] S2. Add 2 g of diphenylmethane diisocyanate to reaction kettle B, keep at 135 °C, and carry out vacuum dehydration for 20 min to obtain the active material component B;

[0036] S3: Lead out continuous fibers from the yarn rack, arrange them through the beam plate, and enter the preheated impregnation mold. The preheating temperature of the impregnation mold is 160 °C, then mix the above-mentioned active material component A and active material component B evenly to obtain a molten mixture and pour it into the impregnation mold; maintain the temperature in the impregnation mold at 160 °C and react for 10 min to obtain an antistatic and flame-retardant continuous fiber reinforced cast nylon composite material.

[0037] In the above example, the basic catalyst can be one or a combination of sodium hydroxide, sodium caprolactamate, magnesium bromide caprolactamate, metallic sodium, metallic potassium, metallic lithium, sodium alkoxide, Grignard reagent, etc. In this application, sodium hydroxide is mainly taken as an example for discussion and analysis.

[0038] In addition, in the selection of the cocatalyst, it can be hexamethylene-1,6-diformylcaprolactam, or a combination of acetylcaprolactam isocyanate compounds. The combination of acetylcaprolactam isocyanate compounds includes toluene-2,4-diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, and isophorone diisocyanate. In this application, the cocatalyst in the above-mentioned examples takes diphenylmethane diisocyanate as an example.

[0039] In the selection of the organophosphorus flame retardant, it can be hexaphenoxycyclotriphosphazene and its cyclic phosphazene derivatives, or phenoxypolyphosphazene and its polyphosphazene derivatives; this application mainly takes hexaphenoxycyclotriphosphazene as an example for discussion.

[0040] Among them, in step S3, the continuous fiber is led out from the yarn frame, and the continuous fiber includes glass fiber, carbon fiber, basalt fiber, or aramid fiber; in the embodiment of this application, the continuous fiber is glass fiber, and the mechanical properties of MC cast nylon are improved by the glass fiber.

[0041] Example 2

[0042] Example 2 uses substantially the same raw materials and process as Example 1 to prepare antistatic and flame-retardant continuous fiber reinforced cast nylon, except that the dosage of monomer caprolactam is different, which is 1554 g; and the dosage of the organophosphorus flame retardant hexaphenoxycyclotriphosphazene is different, which is 300 g.

[0043] Example 3

[0044] Example 3 uses substantially the same raw materials and process as Example 1 to prepare antistatic and flame-retardant continuous fiber reinforced cast nylon, except that the dosage of monomer caprolactam is different, which is 1454 g; and the dosage of the organophosphorus flame retardant hexaphenoxycyclotriphosphazene is different, which is 400 g.

[0045] Example 4

[0046] Example 4 uses substantially the same raw materials and process as Example 1 to prepare antistatic and flame-retardant continuous fiber reinforced cast nylon, except that the dosage of monomer caprolactam is different, which is 1554 g; and the dosage of the organophosphorus flame retardant hexaphenoxycyclotriphosphazene is different, which is 300 g; and the type of the nanomaterial is different, which is amino-functionalized carbon nanotubes.

[0047] Example 5

[0048] Example 5: The antistatic and flame-retardant continuous fiber-reinforced cast nylon was prepared using substantially the same raw materials and process as in Example 1, except that the amount of monomer caprolactam was different, being 1554 g; and the amount of the organophosphorus-based flame retardant hexaphenoxycyclotriphosphazene was different, being 300 g; and the type of nanomaterial was different, being aminated silica.

[0049] Example 6

[0050] Example 6: The antistatic and flame-retardant continuous fiber-reinforced cast nylon was prepared using substantially the same raw materials and process as in Example 1, except that the amount of monomer caprolactam was different, being 1614 g; and the amount of the organophosphorus-based flame retardant hexaphenoxycyclotriphosphazene was different, being 300 g; and the amount of KH550-treated carbon black was different, being 40 g.

[0051] Example 7

[0052] Example 7: The antistatic and flame-retardant continuous fiber-reinforced cast nylon was prepared using substantially the same raw materials and process as in Example 1, except that the amount of monomer caprolactam was different, being 1494 g; and the amount of the organophosphorus-based flame retardant hexaphenoxycyclotriphosphazene was different, being 300 g; and the amount of KH550-treated carbon black was different, being 160 g.

[0053] Example 8

[0054] Example 8: The antistatic and flame-retardant continuous fiber-reinforced cast nylon was prepared using substantially the same raw materials and process as in Example 1, except that the amount of monomer caprolactam was different, being 1554 g; and the amount of the organophosphorus-based flame retardant hexaphenoxycyclotriphosphazene was different, being 300 g; and the type of the modified carbon black treatment agent was different, being γ-chloropropylsilane coupling agent.

[0055] Example 9

[0056] Example 9: The antistatic and flame-retardant continuous fiber-reinforced cast nylon was prepared using substantially the same raw materials and process as in Example 1, except that the amount of monomer caprolactam was different, being 1564 g; and the amount of the organophosphorus-based flame retardant hexaphenoxycyclotriphosphazene was different, being 300 g; and the amount of the nanomaterial aminated montmorillonite was different, being 10 g.

[0057] Example 10

[0058] Example 10: The antistatic and flame-retardant continuous fiber-reinforced cast nylon was prepared using substantially the same raw materials and process as in Example 1, except that the amount of monomer caprolactam was different, being 1554 g; and the type and amount of the organophosphorus-based flame retardant were different, being 300 g of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO).

[0059] Example 11

[0060] Example 11 was used to prepare antistatic and flame-retardant continuous fiber-reinforced cast nylon with basically the same raw materials and process as in Example 1, except that the type of monomer lactam was different, which was laurolactam, and the dosage was different, which was 1554 g; and the dosage of the organic phosphorus-based flame retardant hexaphenoxycyclotriphosphazene was different, which was 300 g.

[0061] Comparative Example

[0062] Comparative Example 1

[0063] Comparative Example 1 was used to prepare antistatic and flame-retardant continuous fiber-reinforced cast nylon with basically the same raw materials and process as in Example 1, except that the dosage of the used monomer caprolactam was different, which was 1974 g; and modified carbon black, organic phosphorus-based flame retardant and nanomaterials were not used.

[0064] Comparative Example 2

[0065] Comparative Example 2 was used to prepare antistatic and flame-retardant continuous fiber-reinforced cast nylon with basically the same raw materials and process as in Example 1, except that the dosage of the used monomer caprolactam was different, which was 1874 g; the used carbon black was not modified with a silane coupling agent, which was 100 g; and organic phosphorus-based flame retardant and nanomaterials were not used.

[0066] Comparative Example 3

[0067] Comparative Example 3 was used to prepare antistatic and flame-retardant continuous fiber-reinforced cast nylon with basically the same raw materials and process as in Example 1, except that the dosage of the used monomer caprolactam was different, which was 1874 g; and organic phosphorus-based flame retardant and nanomaterials were not used.

[0068] Comparative Example 4

[0069] Comparative Example 4 was used to prepare antistatic and flame-retardant continuous fiber-reinforced cast nylon with basically the same raw materials and process as in Example 1, except that the dosage of the used monomer caprolactam was different, which was 1574 g; the dosage of the organic phosphorus-based flame retardant hexaphenoxycyclotriphosphazene was different, which was 300 g; and nanomaterials were not used.

[0070] Performance Detection Test

[0071] Detection Method / Test Method

[0072] The performance of the composite materials prepared in each example and comparative example was tested, and the results are shown in Table 1. Among them, the test standard for tensile properties is GB / T 1040.5-2008; the test standard for flexural properties is GB / T 1449-2005; the test standard for flame retardant properties is GB / T 2408-2021; the antistatic test standard is GB / T 39587-2020.

[0073] Table 1 Performance test of MC nylon prepared in each example and comparative example

[0074]

[0075] According to the descriptions of each example and comparative example, the main difference between Comparative Example 1 and Comparative Example 2 is that Comparative Example 3 added untreated carbon black. As can be seen from the results in Table 1, the flame retardant properties of the materials in Comparative Example 1 and Comparative Example 2 are basically the same, but the mechanical properties of Comparative Example 2 are slightly improved, and its surface resistance drops significantly. This result shows that the addition of carbon black greatly improves the antistatic performance of the material and plays a certain degree of strengthening role on the material.

[0076] The main difference between Comparative Example 1 and Comparative Example 3 is that Comparative Example 3 added carbon black treated with silane coupling agent (KH550). As can be seen from the results in Table 1, the flame retardant properties of the materials in Comparative Example 1 and Comparative Example 3 are basically the same, but the mechanical properties of Comparative Example 3 are slightly improved, and its surface resistance drops significantly. This result shows that the addition of modified carbon black greatly improves the antistatic performance of the material and plays a certain degree of strengthening role on the material.

[0077] The main difference between Comparative Example 2 and Comparative Example 3 is that Comparative Example 3 added carbon black treated with silane coupling agent (KH550). As can be seen from the results in Table 1, the flame retardant properties of the materials in Comparative Example 2 and Comparative Example 3 are basically the same, but the mechanical properties of Comparative Example 3 are slightly improved, and the decline amplitude of its surface resistance is greater. This result shows that after the carbon black is treated with silane coupling agent, it can be better dispersed in the matrix, thereby being able to more significantly improve the antistatic performance of the material.

[0078] It is known that the chemical formula of the silane coupling agent is: R-Si-X3. And X is a hydrolyzable functional group, and Y is an organic functional group. In this application, X can be chloro, methoxy, ethoxy, acetoxy, etc.; Y can be vinyl, amino, epoxy, methacryloxy, mercapto or ureido; and through different combinations and experiments, the above results can be obtained.

[0079] The main differences between Comparative Example 1 and Comparative Example 4 are as follows: Comparative Example 1 did not add organophosphorus flame retardant and modified carbon black. As can be seen from the results in Table 1, the mechanical properties of the material in Comparative Example 1 are much higher than those in Comparative Example 4, but its antistatic performance and flame retardant performance are significantly worse than those of the material in Comparative Example 4. This shows that the addition of organophosphorus flame retardant can significantly improve the flame retardant performance of the composite material, but the mechanical properties will be significantly reduced; the addition of modified carbon black significantly improves the antistatic performance of the material.

[0080] The main differences between Comparative Example 3 and Example 1 are as follows: Comparative Example 3 did not add organophosphorus flame retardant and nanomaterials. As can be seen from the results in Table 1, the flame retardant performance of the material in Example 1 has been improved to reach the V2 level, and at the same time, the mechanical properties of the material in Example 1 are slightly lower than those of the material in Comparative Example 3.

[0081] The main differences between Comparative Example 4 and Example 1 are as follows: Comparative Example 4 did not use nanomaterials and the dosage of the flame retardant was different from that in Example 1. As can be seen from the results in Table 1, although the material in Comparative Example 4 has better flame retardant performance, the amount of the flame retardant accounts for 20% of the molten mixture, which is much larger than the dosage of 10% of the flame retardant in Example 1, and the mechanical properties of the material in Comparative Example 3 are much worse than those of the material in Example 1.

[0082] The main differences between Comparative Example 4 and Example 2 are as follows: Comparative Example 4 did not use nanomaterials. As can be seen from the results in Table 1, the flame retardant properties of the material in Comparative Example 4 are basically the same as those of the material in Example 2, but due to the synergistic effect of the nanomaterials, the mechanical properties of the material in Comparative Example 4 are lower than those of the material in Example 2.

[0083] Combined with the above description, the carbon treated by silane coupling agent in the embodiments of the present invention can be better dispersed in the matrix, and can greatly improve the antistatic performance; the compound use of nanomaterials and organophosphorus flame retardants can achieve an optimal balance between the mechanical properties and flame retardant properties of the composite material.

[0084] It should be noted that the above sequence of the embodiments of the present application is only for description and does not represent the superiority or inferiority of the embodiments. And the above specific embodiments of the present specification have been described. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve the desired results. Additionally, the processes depicted in the figures do not necessarily require the specific order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0085] The foregoing are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

[0086] This specification and the drawings are merely illustrative of the present application and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalent technologies, the present application is intended to include these changes and modifications therein.

Claims

1. An anti-static flame-retardant continuous fiber reinforced cast nylon, characterized in that: The raw materials of the cast nylon include a composition and continuous fibers, wherein the mass of the continuous fibers accounts for 50-95% of the total mass of the cast nylon; the mass of the composition accounts for 5%-50% of the total mass of the cast nylon; The composition is formed by in-situ polymerization of lactam and its corresponding amino acid monomer and modified additives; the modified additives mainly include nanomaterials, modified carbon black, organic phosphorus flame retardant, alkaline catalyst, co-catalyst and other additives; The continuous fibers include one or more of glass fibers, carbon fibers, basalt fibers or aramid fibers.

2. The anti-static flame-retardant continuous fiber reinforced cast nylon according to claim 1, characterized in that: The alkaline catalyst includes one or a combination of sodium hydroxide, sodium caprolactam, caprolactam magnesium bromide, metallic sodium, metallic potassium, metallic lithium, sodium alcoholate, Grignard reagent, etc.; the mass of the alkaline catalyst accounts for 0.1-2% of the mass of the composition.

3. The anti-static flame-retardant continuous fiber reinforced cast nylon according to claim 1, characterized in that: The co-catalyst includes hexamethylene-1,6-diformyl caprolactam, acetyl caprolactam isocyanate compound or a combination thereof; the mass of the co-catalyst accounts for 0.1-2% of the mass of the composition.

4. The anti-static and flame-retardant continuous fiber reinforced cast nylon according to claim 3, characterized in that: The isocyanate compound includes toluene-2,4-diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, and isophorone diisocyanate.

5. The anti-static flame-retardant continuous fiber reinforced cast nylon according to claim 1, characterized in that: The other additives include antioxidants and release agents, etc.; the mass of the other additives accounts for 0.1-2% of the mass of the composition.

6. The anti-static flame-retardant continuous fiber reinforced cast nylon according to claim 1, characterized in that: The nanomaterial includes one or more of amino montmorillonite, amino carbon nanotubes, and amino silicon dioxide; the mass of the nanomaterial accounts for 0.1-3% of the mass of the composition.

7. A method for preparing the anti-static flame-retardant continuous fiber reinforced cast nylon according to claims 1-6, characterized in that: The following steps are involved: S1: a certain weight portion of lactam or its corresponding amino acid monomer is divided into two equal parts and added to reactors A and B, and heated to melt; a certain amount of nanomaterials, modified carbon black, organic phosphorus flame retardant and other additives are added to reactor A in proportion, and vacuum dehydration is performed, and then a certain proportion of alkaline catalyst is added, and the temperature is maintained at 110-150°C, and vacuum dehydration is continued for 5-45 minutes to obtain active material component A; S2: Heat and vacuum dehydrate in the B reactor for 5-15 minutes, then add a certain proportion of co-catalyst, maintain 120-145°C, and vacuum dehydrate for 5-45 minutes to obtain active material B component; S3: The continuous fiber is drawn out from the creel, arranged on the clustering plate, and enters the preheated impregnation mold; The preheating temperature of the dipping mold is 120-180 o C. Then, the active material A component and the active material B component are mixed evenly to obtain a molten mixture which is poured into an impregnation mold; the temperature in the impregnation mold is maintained at 120-180° C. and the reaction is performed for 1-10 minutes to obtain an anti-static flame-retardant continuous fiber reinforced cast nylon composite material.

8. The anti-static flame-retardant continuous fiber reinforced cast nylon and the preparation method thereof according to claim 7, characterized in that: The modified carbon black refers to carbon black treated with a silane coupling agent; the mass of the modified carbon black accounts for 0.1-5% of the mass of the composition.

9. The anti-static flame-retardant continuous fiber reinforced cast nylon and the preparation method thereof according to claim 8, characterized in that: The chemical formula of the silane coupling agent is: R-Si-X3, X is a hydrolyzable functional group, which can be a chloro group, a methoxy group, an ethoxy group, an acetoxy group, etc.; Y is an organic functional group, such as a vinyl group, an amino group, an epoxy group, a methacryloxy group, a mercapto group or a urea group.

10. The method for preparing the anti-static and flame-retardant continuous fiber reinforced cast nylon according to claim 6, characterized in that: The organophosphorus flame retardant includes one or more of an organophosphorus flame retardant including hexaphenoxy cyclotriphosphazene and its cyclic phosphazene derivatives, phenoxy polyphosphazene and its polyphosphazene derivatives; the mass of the organophosphorus flame retardant accounts for 1-30% of the mass of the composition.

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