Polyamide / polyphenyl ether alloy material and preparation method thereof

Abstract

The invention discloses a polyamide / polyphenyl ether alloy material and a manufacturing method thereof, and is used for solving the problems that an existing polyamide / polyphenyl ether alloy material cannot meet UL94 V-0-level flame retardance, high insulativity of CTI greater than or equal to 700V and low precipitation (lt) after long-term damp-heat aging at the same time under the ultra-thin thickness of 0.6 mm; 0.1%) and a high performance retention rate (gt; 90%). The polyamide / polyphenyl ether alloy material comprises the following components in parts by mass: 55-75 parts of polyamide 66 resin; 25 to 45 parts of polyphenyl ether resin pre-irradiated by gamma rays; 10 to 20 parts of a silicone-coated diethyl aluminum phosphinate flame retardant with a core-shell structure; 5-10 parts of a maleic anhydride grafted high impact polystyrene compatilizer pre-irradiated by gamma rays; 20-30 parts of hydrolysis-resistant glass fiber of which the surface is treated by a silane coupling agent; 3-8 parts of tetrapod-like zinc oxide whiskers; 2 to 5 parts of a CTI synergist; and 1-2 parts of an anti-precipitation agent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-performance engineering plastics, and in particular to a polyamide / polyphenylene ether alloy material and a manufacturing method thereof. BACKGROUND

[0002] Polyamide / polyphenylene ether alloy material (PA / PPO alloy material) is considered as an ideal material for high-voltage electrical insulation components due to its excellent mechanical properties, heat resistance and electrical insulation.

[0003] However, the traditional high-glass-fiber-filled PA / PPO alloy material has inherent contradictions in achieving high flame retardancy (UL94 V-0) and high tracking index (CTI ≥ 600V): a large amount of flame retardant needs to be added to achieve UL94 V-0 level, and the flame retardant (especially phosphorus-nitrogen system) is easy to migrate and precipitate, resulting in serious attenuation of CTI value. As described in patent CN114085522A, the CTI is usually only 200-400V. The existing similar solutions are mostly focused on optimizing the compounding of flame retardants or adding special fillers. For example, the scheme in patent CN119899522A adds aniline black material, which improves the CTI, but the aniline black material is an organic pigment that is easy to precipitate after high temperature and high humidity aging; the scheme in patent CN118546524A has a strength retention rate > 70% after 130℃ aging for 1500 hours, but the appearance of the material is only evaluated in the wet heat aging, which cannot guarantee the CTI and other performance retention rate, and cannot meet the long-term reliability requirements.

[0004] In general, the shortcomings of the existing technology can be mainly summarized as follows:

[0005] 1. Migration and precipitation of flame retardant: Traditional small molecule phosphorus and bromine-based flame retardants have poor compatibility with the polymer matrix, and are easy to migrate to the surface of the material in a high temperature and high humidity environment, which not only leads to the deterioration of electrical properties such as CTI, but also may corrode precision electronic components.

[0006] 2. Conflict between ultra-thin and high flame retardancy: When the thickness of the material is reduced to below 0.8mm, it is difficult to maintain V-0 level flame retardancy, and the amount of flame retardant usually needs to be increased significantly, which further exacerbates the precipitation problem and damages the mechanical properties.

[0007] 3. Poor interfacial compatibility: PA and PPO are thermodynamically incompatible systems, and poor compatibility under high filling leads to phase separation, which causes stress concentration, reduces impact strength, and affects the flame retardant efficiency. The root cause of these shortcomings is the failure to innovatively design the structure of the flame retardant to isolate migration, and the lack of effective means to simultaneously improve the interfacial compatibility of multiple components.

[0008] The difficulty in solving these problems lies in finding a comprehensive solution that can simultaneously coat the flame retardant, reduce the precipitation of the flame retardant, increase the interfacial compatibility, and improve the CTI without significantly increasing the cost. Summary of the Invention

[0009] This invention discloses a polyamide / polyphenylene ether alloy material and its manufacturing method, which solves the technical problem that existing polyamide / polyphenylene ether alloy materials cannot simultaneously meet the requirements of UL94 V-0 flame retardancy, CTI≥700V high insulation, low precipitation (<0.1%) and high performance retention rate (>90%) after long-term damp heat aging, with an ultra-thin thickness of 0.6mm.

[0010] The present invention provides a polyamide / polyphenylene ether alloy material, which comprises the following components by weight:

[0011] 55-75 parts of polyamide 66 resin;

[0012] 25-45 parts of polyphenylene ether resin pre-irradiated with gamma rays;

[0013] 10-20 parts of core-shell structured silicone-coated aluminum diethylphosphinate flame retardant;

[0014] 5-10 parts of maleic anhydride grafted high-impact polystyrene compatibilizer pre-irradiated with gamma rays; 20-30 parts of hydrolysis-resistant glass fiber with surface treated with silane coupling agent.

[0015] 3-8 parts of tetrane-shaped zinc oxide whiskers;

[0016] CTI synergist 2-5 parts;

[0017] 1-2 parts of anti-precipitation agent.

[0018] Optionally, the polyphenylene ether resin pre-irradiated with gamma rays is specifically a polyphenylene ether resin pre-irradiated with gamma rays at a dose of 0.5-1.2 mgy.

[0019] Optionally, the maleic anhydride-grafted high-impact polystyrene compatibilizer pre-irradiated with gamma rays is specifically a maleic anhydride-grafted high-impact polystyrene compatibilizer pre-irradiated with gamma rays at a dose of 0.5-1.2 mgy.

[0020] Optionally, the core-shell structured silicone-coated aluminum diethylphosphinate flame retardant specifically uses aluminum diethylphosphinate as the core and fumed silica as the shell.

[0021] The shell thickness is 100-200 nm, and the coverage rate is ≥95%.

[0022] Optionally, the CTI synergist is linear low-density polyethylene-g-acrylic acid.

[0023] Optionally, the anti-exudant is a hyperbranched polyester amide.

[0024] The present invention provides a method for manufacturing a polyamide / polyphenylene ether alloy material, comprising the following steps:

[0025] Irradiation treatment: Polyphenylene ether resin and maleic anhydride-grafted high-impact polystyrene compatibilizer were respectively irradiated with γ-rays at doses of 0.5-1.2 mgy;

[0026] Vacuum drying: The polyamide 66 resin is vacuum dried at a first preset temperature until the moisture content is ≤500ppm;

[0027] Mixing and Extrusion: The dried polyamide 66 resin, gamma-ray pre-irradiated polyphenylene ether resin, core-shell silicone-coated aluminum diethylphosphinate flame retardant, gamma-ray pre-irradiated maleic anhydride-grafted high-impact polystyrene compatibilizer, CTI synergist, and anti-exudation agent are mixed at high speed; then the mixture is fed into the extruder through the main feed port, and hydrolysis-resistant glass fibers and tetra-needle zinc oxide whiskers with silane coupling agent surface treatment are added through the side feed port; after melt blending, extrusion, water cooling, and pelletizing, the composite material is obtained;

[0028] Vacuum annealing: The composite material is treated in a vacuum environment at a second preset temperature for a first preset time to obtain a polyamide / polyphenylene ether alloy material.

[0029] Optionally, in the mixing and extrusion steps, the extruder is a twin-screw extruder, wherein the twin-screw extruder adopts a three-stage variable diameter screw and zone temperature control: zone one temperature is 215-225℃, zone two temperature is 250-260℃, and zone three temperature is 235-245℃.

[0030] Optionally, in the vacuum drying step, the first preset temperature is 100-130℃.

[0031] Optionally, in the vacuum annealing step, the second preset temperature is 100-130℃, and the first preset time is 3-5 hours.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The polyamide / polyphenylene ether alloy material of the present invention comprises, by weight, the following components: 55-75 parts of polyamide 66 resin; 25-45 parts of polyphenylene ether resin pre-irradiated with gamma rays; 10-20 parts of core-shell structured silicone-coated aluminum diethylphosphinic acid flame retardant; 5-10 parts of maleic anhydride-grafted high-impact polystyrene compatibilizer pre-irradiated with gamma rays; 20-30 parts of hydrolysis-resistant glass fiber with a surface treated with a silane coupling agent; 3-8 parts of tetraneedle-shaped zinc oxide whiskers; 2-5 parts of CTI synergist; and 1-2 parts of anti-exudation agent.

[0034] In the above design, the core-shell structure silicone-coated aluminum diethylphosphinate flame retardant fundamentally and physically blocks the migration and precipitation of the flame retardant. The pre-irradiated polyphenylene ether resin and the pre-irradiated maleic anhydride-grafted high-impact polystyrene compatibilizer generate active free radicals on their molecular chains, greatly improving interfacial compatibility and grafting efficiency during subsequent melt blending. The whisker charge traps constructed by the tetra-needle zinc oxide whiskers and the CTI enhancer effectively improve CTI. The anti-precipitation agent enhances the long-term reliability of the alloy material, effectively inhibiting changes in the internal structure of the material over time due to small molecule migration, maintaining the mechanical property stability of the alloy, and extending the service life of the product.

[0035] Through the above design, the polyamide / polyphenylene ether alloy material of the present invention has the following advantages:

[0036] Ultra-thin and highly flame-retardant: Polyamide / polyphenylene ether alloy material that can pass UL94 V-0 certification at a thickness of 0.6mm makes lightweight component design possible;

[0037] Ultra-high insulation reliability: The CTI value is as high as 735V, and after 1000 hours of humid heat aging at 85℃ / 85%RH, the CTI retention rate is >90% and the exudate content is <0.05%, completely eliminating the risk of insulation failure under high voltage.

[0038] Green and long-lasting performance: halogen-free flame retardant, non-corrosive, with extremely low performance degradation throughout the material's lifespan, ensuring the safety of the battery system throughout its entire life cycle.

[0039] In summary, this polyamide / polyphenylene oxide alloy material can effectively solve the technical problems of existing polyamide / polyphenylene oxide alloy materials being unable to simultaneously meet the requirements of UL94 V-0 flame retardancy, CTI≥700V high insulation, and low precipitation (<0.1%) and high performance retention (>90%) after long-term damp heat aging, with an ultra-thin thickness of 0.6mm. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 A flowchart illustrating a method for manufacturing a polyamide / polyphenylene ether alloy material provided by this invention. Detailed Implementation

[0042] This invention discloses a polyamide / polyphenylene ether alloy material and its manufacturing method, which solves the technical problem that existing polyamide / polyphenylene ether alloy materials cannot simultaneously meet the requirements of UL94 V-0 flame retardancy, CTI≥700V high insulation, low precipitation (<0.1%) and high performance retention rate (>90%) after long-term damp heat aging, with an ultra-thin thickness of 0.6mm.

[0043] To enable those skilled in the art to better understand the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] On the one hand, the polyamide / polyphenylene ether alloy material provided by the present invention comprises the following components by mass:

[0045] 55-75 parts of polyamide 66 resin;

[0046] 25-45 parts of polyphenylene ether resin pre-irradiated with gamma rays;

[0047] 10-20 parts of core-shell structured silicone-coated aluminum diethylphosphinate flame retardant;

[0048] 5-10 parts of maleic anhydride-grafted high-impact polystyrene compatibilizer pre-irradiated with gamma rays;

[0049] 20-30 parts of hydrolysis-resistant glass fiber with surface treated with silane coupling agent;

[0050] 3-8 parts of tetrane-shaped zinc oxide whiskers;

[0051] CTI synergist 2-5 parts;

[0052] 1-2 parts of anti-precipitation agent.

[0053] It should be noted that the viscosity of the polyamide 66 resin mentioned above is 2.4-2.7 Pa·s, and it can be sourced from the manufacturer Pingdingshan Shenma. The dosage can be 55 parts, 56 parts, 60 parts, 70 parts, or 75 parts.

[0054] The polyphenylene ether resin mentioned above has a weight-average molecular weight Mw=50,000 and can be sourced from the manufacturer Lanxing Group. Its dosage can be 25 parts, 28 parts, 30 parts, 40 parts, or 45 parts.

[0055] The amount of core-shell structured silicone-coated aluminum diethylphosphinic acid flame retardant can be 10 parts, 15 parts, 18 parts, or 20 parts.

[0056] The amount of maleic anhydride-grafted high-impact polystyrene compatibilizer can be 5 parts, 6 parts, 8 parts, or 10 parts.

[0057] Hydrolysis-resistant glass fiber with surface treated with silane coupling agent, specifically, hydrolysis-resistant glass fiber treated with silane coupling agent, wherein the glass fiber can be sourced from the manufacturer Jushi Group, and the amount used can be 20 parts, 22 parts, 25 parts, 28 parts, or 30 parts.

[0058] Four needle-like zinc oxide whiskers, with a length of 10-50μm, can be sourced from the manufacturer Tianyou Jingchuang, and the dosage can be 3 parts, 5 parts, 6 parts, or 8 parts.

[0059] CTI synergist enhances the surface resistance to electro-tracking in polyamide / polyphenylene ether alloys, ensuring their long-term safety and reliability in harsh electrical environments. Specifically, linear low-density polyethylene-g-acrylic acid can be selected, with an acrylic acid grafting rate of 1.0%, sourced from Dow Chemical, and the dosage can be 2 parts, 3 parts, or 5 parts.

[0060] Anti-precipitation agents can enhance the long-term reliability of alloy materials, effectively inhibiting changes in the internal structure of the material over time caused by the migration of small molecules, maintaining the mechanical property stability of the alloy, and extending the service life of the product. Specifically, hyperbranched polyesteramide, sourced from Weihai Chenyuan, can be used in dosages of 1 part, 1.2 parts, 1.5 parts, or 2 parts.

[0061] In the above design, the core-shell structure silicone-coated aluminum diethylphosphinate flame retardant fundamentally and physically blocks the migration and precipitation of the flame retardant. The pre-irradiated polyphenylene ether resin and the pre-irradiated maleic anhydride-grafted high-impact polystyrene compatibilizer generate active free radicals on their molecular chains, greatly improving interfacial compatibility and grafting efficiency during subsequent melt blending. The whisker charge traps constructed by the tetra-needle zinc oxide whiskers and the CTI enhancer effectively improve CTI. The anti-precipitation agent enhances the long-term reliability of the alloy material, effectively inhibiting changes in the internal structure of the material over time due to small molecule migration, maintaining the mechanical property stability of the alloy, and extending the service life of the product.

[0062] Through the above design, the polyamide / polyphenylene ether alloy material of the present invention has the following advantages:

[0063] Ultra-thin and highly flame-retardant: Polyamide / polyphenylene ether alloy material that can pass UL94 V-0 certification at a thickness of 0.6mm makes lightweight component design possible;

[0064] Ultra-high insulation reliability: The CTI value is as high as 735V, and after 1000 hours of humid heat aging at 85℃ / 85%RH, the CTI retention rate is >90% and the exudate content is <0.05%, completely eliminating the risk of insulation failure under high voltage.

[0065] Green and long-lasting performance: halogen-free flame retardant, non-corrosive, with extremely low performance degradation throughout the material's lifespan, ensuring the safety of the battery system throughout its entire life cycle.

[0066] In summary, this polyamide / polyphenylene oxide alloy material can effectively solve the technical problems of existing polyamide / polyphenylene oxide alloy materials being unable to simultaneously meet the requirements of UL94 V-0 flame retardancy, CTI≥700V high insulation, and low precipitation (<0.1%) and high performance retention (>90%) after long-term damp heat aging, with an ultra-thin thickness of 0.6mm.

[0067] Furthermore, in this embodiment, the polyphenylene ether resin pre-irradiated with gamma rays is specifically polyphenylene ether resin pre-irradiated with gamma rays at a dose of 0.5-1.2 mgy.

[0068] It should be noted that the polyphenylene ether resin pre-irradiated with gamma rays generates active free radicals on its molecular chain, which greatly improves the interfacial compatibility and grafting efficiency during subsequent melt blending. The gamma ray dose can be 0.5 mgy, 1.0 mgy, 1.1 mgy, etc., and this embodiment does not impose any limitations on this.

[0069] Furthermore, in this embodiment, the maleic anhydride-grafted high-impact polystyrene compatibilizer pre-irradiated with gamma rays is specifically a maleic anhydride-grafted high-impact polystyrene compatibilizer pre-irradiated with gamma rays at a dose of 0.5-1.2 MGy.

[0070] It should be noted that the maleic anhydride-grafted high-impact polystyrene compatibilizer, pre-irradiated with gamma rays, generates active free radicals on its molecular chain, which greatly improves the interfacial compatibility and grafting efficiency during subsequent melt blending. The gamma ray dose can be 0.5 mgy, 1.0 mgy, 1.1 mgy, etc., and this embodiment does not impose any limitations on this.

[0071] Furthermore, in this embodiment, the core-shell structure silicone-coated aluminum diethylphosphinate flame retardant specifically uses aluminum diethylphosphinate as the core and fumed silica as the shell.

[0072] The shell thickness is 100-200nm, specifically 100nm, 130nm, 160nm, 200nm, etc., with a coverage rate of ≥95%.

[0073] It should be noted that, through the above design, fumed silica acts as a shell to encapsulate the aluminum diethylphosphinate core, fundamentally physically blocking the migration and precipitation of flame retardants, ensuring that the subsequent polyamide / polyphenylene ether alloy material has high flame retardant performance, enabling the alloy material to meet the UL94 V-0 flame retardant rating.

[0074] Please see Figure 1Secondly, the present invention provides a method for manufacturing a polyamide / polyphenylene ether alloy material, comprising the following steps:

[0075] S1. Irradiation treatment: Polyphenylene ether resin and maleic anhydride-grafted high-impact polystyrene compatibilizer are respectively irradiated with γ-rays at a dose of 0.5-1.2 mgy;

[0076] S2. Vacuum drying: Vacuum dry the polyamide 66 resin at 100-130℃ until the moisture content is ≤500ppm;

[0077] S3. Mixing and Extrusion: The dried polyamide 66 resin, gamma-ray pre-irradiated polyphenylene ether resin, core-shell silicone-coated aluminum diethylphosphinate flame retardant, gamma-ray pre-irradiated maleic anhydride-grafted high-impact polystyrene compatibilizer, CTI synergist, and anti-exudation agent are mixed at high speed; then the mixture is added to the extruder through the main feed port, and hydrolysis-resistant glass fibers and tetra-needle zinc oxide whiskers with silane coupling agent surface treatment are added through the side feed port; after melt blending, extrusion, water cooling, and pelletizing, the composite material is obtained.

[0078] S4. Vacuum annealing: The composite material is treated in a vacuum environment at 100-130℃ for a first preset time of 3-5 hours to obtain a polyamide / polyphenylene ether alloy material.

[0079] Specifically, in the mixing and extrusion steps, the extruder is a twin-screw extruder, wherein the twin-screw extruder employs a three-stage variable diameter screw with zoned temperature control: zone one temperature is 215-225℃ (which can be 215℃, 220℃, 223℃, 225℃, etc.), zone two temperature is 250-260℃ (which can be 251℃, 252℃, 256℃, 260℃, etc.), and zone three temperature is 235-245℃ (which can be 235℃, 240℃, 242℃, 245℃, etc.).

[0080] It should be noted that in the aforementioned vacuum annealing process, internal stress is eliminated through thermal relaxation, phase structure is optimized, and volatiles are removed, thereby improving the dimensional stability, mechanical properties, and long-term reliability of the polyamide / polyphenylene ether alloy material. This step is crucial for ensuring the performance of alloy products in high-end fields such as precision electronics and automotive parts.

[0081] It should be further noted that the products made from the polyamide / polyphenylene ether alloy material obtained by the above manufacturing method achieve a UL94 V-0 rating, CTI≥700V performance at a thickness of 0.6mm, and exhibit low precipitation (<0.1%) and high performance retention rate (>90%) after long-term aging.

[0082] The numerical range described in this invention includes not only the point values ​​listed above, but also any point values ​​within the numerical ranges not listed above. Due to space limitations and for the sake of brevity, this invention will not exhaustively list all the specific point values ​​included in the range.

[0083] The performance of this composite material will be verified through multiple examples and comparative examples, as follows:

[0084] Examples 1-3

[0085] Prepare the raw materials, including by weight:

[0086] Polyamide 66 resin, viscosity 2.4-2.7 Pa·s;

[0087] Polyphenylene ether resin pre-irradiated with gamma rays, with an irradiation dose of 0.8 mgy;

[0088] A core-shell structured silicone-coated aluminum diethylphosphinic acid flame retardant, wherein the shell thickness is 150±20nm and the coating rate is 96%;

[0089] Maleic anhydride grafted with high-impact polystyrene compatibilizer pre-irradiated with gamma rays, grafting rate 1.8%, irradiation dose 0.8 MGy;

[0090] Hydrolysis-resistant glass fiber with surface treated with silane coupling agent;

[0091] Four needle-like zinc oxide whiskers;

[0092] Linear low-density polyethylene-g-acrylic acid (CTI synergist), acrylic acid grafting rate 1.0%;

[0093] Hyperbranched polyester amide (anti-exudation agent).

[0094] Preparation method:

[0095] Polyamide 66 resin was vacuum dried at 120℃ for 6 hours. Each component (parts by weight) was weighed according to the formulation in Table 1. Polyamide 66 resin (PA66), pre-irradiated polyphenylene ether resin (PPO), core-shell silicone-coated aluminum diethylphosphinate flame retardant, pre-irradiated maleic anhydride-grafted high-impact polystyrene compatibilizer (MAH-g-HIPS), linear low-density polyethylene-g-acrylic acid (LLDPE-g-AA), and hyperbranched polyesteramide were poured into a high-speed mixer and mixed at 400 r / min for 5 minutes. The mixed material was fed into a co-rotating twin-screw extruder (screw diameter 40 mm, L / D = 44:1, equipped with a 16-unit static mixer at the end of the three zones) through the main feed port. Hydrolysis-resistant glass fiber and tetra-needle zinc oxide whiskers were added through the side feed port.

[0096] Extruder temperature settings: Zone 1 220℃, Zone 2 255℃, Zone 3 240℃, main extruder speed 300 r / min. After water cooling, pelletizing, and drying, the melt is annealed in a vacuum oven at 120℃ for 4 hours to obtain polyamide / polyphenylene ether alloy material.

[0097] Comparative Example 1

[0098] In Comparative Example 1, the specific components used differ from those in Examples 1-3 in that ordinary aluminum diethylphosphinate flame retardant was used, along with un-pre-irradiated PPO and MAH-g-HIPS. The preparation method was the same as in Examples 1-3.

[0099] Comparative Example 2

[0100] In Comparative Example 2, the specific components used differ from those in Examples 1-3 in that tetra-needle zinc oxide whiskers were not used. The preparation method was the same as in Examples 1-3.

[0101] The polyamide / polyphenylene ether alloy materials of the examples and comparative examples were injection molded into standard test strips for performance testing. The results are shown in Table 2.

[0102]

[0103] Table 1

[0104]

[0105] Table 2

[0106] Results analysis:

[0107] As can be seen from Examples 1-3, the polyamide / polyphenylene ether alloy materials prepared by this invention all achieve a V-0 flame retardant rating at an ultrathin thickness of 0.6 mm, with CTI values ​​far exceeding 700V, and exhibit extremely high performance retention after long-term aging with very few precipitates. Comparative Example 1, which did not use a core-shell flame retardant or pre-irradiation process, showed a significant decrease in flame retardant rating, CTI value, and post-aging performance, with severe precipitation, demonstrating the necessity of these two technologies. Comparative Example 2, which did not use four-needle ZnO whiskers, showed a significantly lower CTI value and post-aging CTI retention rate than Examples 1-3, demonstrating the crucial role of whiskers in improving and maintaining high insulation performance.

[0108] The above provides a detailed description of a polyamide / polyphenylene ether alloy material and its manufacturing method provided by the present invention. For those skilled in the art, based on the ideas of the embodiments of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A polyamide / polyphenylene ether alloy material characterized by, By mass parts include the following components: Polyamide 66 resin 55-75 parts; Polyphenylene ether resin pre-irradiated by gamma rays 25-45 parts; Core-shell structure silicone-coated aluminum diethyl phosphinate flame retardant 10-20 parts; Maleic anhydride grafted high impact polystyrene compatibilizer pre-irradiated by gamma rays 5-10 parts; Surface treated with silane coupling agent hydrolysis resistant glass fiber 20-30 parts; Four needle zinc oxide whiskers 3-8 parts; CTI synergist 2-5 parts; Anti-precipitation agent 1-2 parts.

2. The polyamide / polyphenylene ether alloy material of claim 1, wherein The polyphenylene ether resin pre-irradiated by gamma rays is specifically polyphenylene ether resin pre-irradiated by gamma rays with a dose of 0.5-1.2 MGy.

3. The polyamide / polyphenylene ether alloy material of claim 1, wherein The maleic anhydride grafted high impact polystyrene compatibilizer pre-irradiated by gamma rays is specifically maleic anhydride grafted high impact polystyrene compatibilizer pre-irradiated by gamma rays with a dose of 0.5-1.2 MGy.

4. The polyamide / polyphenylene ether alloy material of claim 1, wherein The core-shell structure silicone-coated aluminum diethyl phosphinate flame retardant is specifically aluminum diethyl phosphinate as the core, and fumed silica as the shell. Among them, the shell thickness is 100-200 nm, and the coating rate is ≥95%.

5. The polyamide / polyphenylene ether alloy material of claim 1, wherein The CTI synergist is linear low density polyethylene-g-acrylic acid.

6. The polyamide / polyphenylene ether alloy material of claim 1, wherein The anti-precipitation agent is hyperbranched polyester amide.

7. A method of producing a polyamide / polyphenylene ether alloy material, characterized by, It includes the following steps: Irradiation treatment: polyphenylene ether resin and maleic anhydride grafted high impact polystyrene compatibilizer are respectively irradiated by gamma rays with a dose of 0.5-1.2 MGy; Vacuum drying: polyamide 66 resin is vacuum dried at a first preset temperature to a water content of ≤500 ppm; Mixing and extrusion: the dried polyamide 66 resin, polyphenylene ether resin pre-irradiated by gamma rays, core-shell structure silicone-coated aluminum diethyl phosphinate flame retardant, maleic anhydride grafted high impact polystyrene compatibilizer pre-irradiated by gamma rays, CTI synergist and anti-precipitation agent are mixed at high speed; then the mixture is added to the extruder from the main feeding port, and the surface treated with silane coupling agent hydrolysis resistant glass fiber and four needle zinc oxide whiskers are added from the side feeding port; melt blending, extrusion, water cooling, and granulation are carried out to obtain a composite material; Vacuum annealing: the composite material is treated in a vacuum environment at a second preset temperature for a first preset time to obtain a polyamide / polyphenylene ether alloy material.

8. The method of producing a polyamide / polyphenylene ether alloy material according to claim 7, characterized by, In the step of mixing and extrusion, the extruder is a double screw extruder, wherein the double screw extruder adopts a three-stage variable diameter screw, and the temperature is controlled in different zones: the temperature in the first zone is 215-225°C, the temperature in the second zone is 250-260°C, and the temperature in the third zone is 235-245°C.

9. The method of making a polyamide / polyphenylene ether alloy material of claim 7, wherein In the step of vacuum drying, the first preset temperature is 100-130°C.

10. The method of making a polyamide / polyphenylene ether alloy material of claim 7, wherein In the step of vacuum annealing, the second preset temperature is 100-130°C, and the first preset time is 3-5 hours.

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