Halogen-free flame-retardant reinforced nylon material as well as preparation method and application thereof

Abstract

The invention provides a halogen-free flame-retardant reinforced nylon material and a preparation method and application thereof, and the halogen-free flame-retardant reinforced nylon material comprises the following components in parts by weight: 95-100 parts of nylon resin, 14-18 parts of a halogen-free flame retardant, 3-8 parts of a synergist, 5-10 parts of an anti-precipitation agent, 0.2-0.8 part of a nucleating agent, 5-8 parts of a dispersant, 1-4 parts of a lubricant and 0.4-0.8 part of an antioxidant. The preparation method of the halogen-free flame-retardant reinforced nylon material comprises the following steps: preparing the halogen-free flame retardant, pretreating the nylon resin and preparing the halogen-free flame-retardant reinforced nylon material.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and in particular to a halogen-free flame-retardant reinforced nylon material and a preparation method and application thereof. Background Art

[0002] As an engineering plastic, polyamide (nylon) material has high mechanical properties, impact properties, and high heat resistance. It is a type of material with excellent performance and is widely used in the fields of electronics, LED lighting, and the automotive industry. However, nylon is easy to burn and cannot meet the high flame retardant performance requirements in the fields of electronics, new energy vehicles, aerospace, and construction. With the advancement of science and technology and the acceleration of the industrialization process, the demand for high-performance nylon materials, especially those with strong toughness, high temperature resistance, and good flame retardant properties, is growing. Especially in high-end electronic equipment, such as high-end servers, communication equipment, and aerospace electronic equipment, it is necessary to be less deformed during processing and installation. The exterior parts of the car's body panels, hoods, etc. need to have good toughness and ductility to adapt to the complex deformation of the car. Nylon materials with high flexibility and ductility are needed to ensure that these parts are not easy to break during collisions. At the same time, their flame retardant grades also need to meet the safety requirements of the car.

[0003] In order to improve the flame retardant properties of nylon, it is often necessary to add flame retardants to nylon resin to achieve fireproof function. In the prior art, halogenated or halogen-free flame retardants are usually added to nylon to achieve flame retardancy. Halogen-free flame retardants refer to a class of flame retardants that do not contain halogen components. This type of flame retardant is added during the processing of polymer materials such as nylon to improve the flame retardant properties of the material, reduce its burning rate, and even achieve a self-extinguishing effect. The working principle of halogen-free flame retardants is mainly to form a porous carbon layer to isolate the transfer of heat and oxygen, thereby slowing down the combustion process. In addition, halogen-free flame retardants can absorb a large amount of heat during endothermic decomposition and dehydration, inhibiting the temperature rise of the burning part and its vicinity, and the decomposed water vapor in turn prevents the release of combustible gases, further enhancing the flame retardant effect. There are various types of halogen-free flame retardants used for nylon materials, including but not limited to red phosphorus, melamine salts, hydrates of metal oxides (such as aluminum hydroxide, magnesium hydroxide, etc.), phosphorus compounds (such as phosphinates, etc.), silicon-based flame retardants and nitrogen-based flame retardants. These flame retardants have their own characteristics and can be selected according to the specific needs and processing conditions of nylon materials. Red phosphorus may cause nylon products to darken in color, be hygroscopic, have certain toxicity and dust explosion risks. These flame retardants have their own characteristics and can be selected according to the specific needs and processing conditions of nylon materials. The means of modification of melamine salts are limited, which can easily affect the mechanical properties and toughness of nylon. Hydrates of metal oxides (such as aluminum hydroxide, magnesium hydroxide, etc.) need to be added in large quantities to achieve flame retardant effects, which can easily affect the mechanical properties and processing properties of nylon. Phosphorus compounds (such as phosphinates, etc.) can easily have a certain impact on the elongation at break and melting point of nylon while improving flame retardant properties; nitrogen flame retardants have poor compatibility with nylon, are easy to absorb moisture, and affect the mechanical and electrical properties of the material. Therefore, it is of practical significance to prepare a nylon material with strong toughness, high temperature resistance and good flame retardant properties to meet the performance requirements of various application fields. Summary of the invention

[0004] The present invention provides a halogen-free flame-retardant reinforced nylon material and a preparation method and application thereof, in order to solve the problems raised in the above-mentioned background technology.

[0005] To solve the above technical problems, the present invention discloses a halogen-free flame retardant reinforced nylon material, comprising the following components: nylon resin, halogen-free flame retardant, synergist, anti-precipitation agent, nucleating agent, dispersant, lubricant, antioxidant, reinforcing agent and toughening agent.

[0006] Furthermore, the following components are included by weight: 95-100 parts of nylon resin, 14-18 parts of halogen-free flame retardant, 3-8 parts of synergist, 5-10 parts of anti-precipitation agent, 0.2-0.8 parts of nucleating agent, 5-8 parts of dispersant, 1-4 parts of lubricant, 0.4-0.8 parts of antioxidant, 3-8 parts of reinforcing agent and 5-10 parts of toughening agent.

[0007] Furthermore, the halogen-free flame retardant comprises the following components and parts by weight: 3-8 parts of nano-montmorillonite, 25-30 parts of polyphenylene ether-isoprenol polyoxyethylene ether and 5-10 parts of polydimethylsiloxane.

[0008] Furthermore, the synergist is phosphorus-nitrogen modified silane XY-AP100 from Xinyi Synthesis, the anti-precipitation agent is PA612, the nucleating agent includes calcium carbonate inorganic nucleating agent and sorbitol organic nucleating agent, the dispersant includes hydroxyethyl ethylene bisstearamide and nano-silica, the lubricant is PE wax PE520, the antioxidant is antioxidant 1010, the reinforcing agent is dry para-aramid pulp, and the toughening agent is thermoplastic elastomer Kraton A1536HS.

[0009] Furthermore, the weight ratio of the inorganic nucleating agent calcium carbonate to the organic nucleating agent sorbitol is 3:2, and the weight ratio of the hydroxyethyl ethylene bisstearic acid amide to the nano silicon dioxide is 2:3.

[0010] The invention discloses a method for preparing a halogen-free flame retardant reinforced nylon material. The preparation method comprises preparing a halogen-free flame retardant, pretreating a nylon resin and preparing the halogen-free flame retardant reinforced nylon material.

[0011] Furthermore, the step of preparing the halogen-free flame retardant is to stir and mix the nano-montmorillonite, polyphenylene ether-isoprenol polyoxyethylene ether and polydimethylsiloxane at room temperature and 400 rpm for 4 hours to obtain the halogen-free flame retardant.

[0012] Furthermore, the step of pretreating the nylon resin comprises weighing 3-8 parts of γ-aminopropyltriethoxysilane (KH-550), 0.6-1.2 parts of nanographene, 0.1-0.4 parts of sodium lignin sulfonate and 0.1-0.3 parts of sodium dodecyl sulfate by weight, adding them to ethanol, stirring at room temperature at a stirring speed of 500 rpm for 30 minutes, adding a weak alkaline solution of sodium bicarbonate to adjust the pH value of the solution to 7.6, filtering through a 0.45 μm filter membrane to obtain a treatment solution, immersing nylon PA66 resin particles in the treatment solution at room temperature for 4 hours, and drying at 80° C. for 4 hours to obtain the treated nylon resin.

[0013] Furthermore, the step of preparing the halogen-free flame retardant reinforced nylon material is to add nylon PA6 resin to the main material scale according to weight, add halogen-free flame retardant, synergist phosphorus nitrogen modified silane, PA612, calcium carbonate, sorbitol, hydroxyethyl ethylene bis stearic acid amide and nano silicon dioxide into a mixer for mixing, put into a high-speed mixer for melt mixing, add PE wax PE520 and antioxidant 1010, evenly disperse to form the main material, add auxiliary material scale, dry para-aramid pulp and thermoplastic elastomer Kra Add tonA1536HS to the side feeding metering scale, start the twin-screw extruder, and start the main material and auxiliary material metering extruders in turn. After the material is discharged, start the side feeding metering extruder. In the temperature control area of ​​the twin-screw extruder, the temperature is 80℃-250℃, the vacuum degree is 0.08MPa, and the extrusion speed is 800rpm. Heat, melt and blend extrusion are carried out. The strips are cooled by water and enter the pelletizer to be pelletized at a speed of 1000rpm to make halogen-free flame retardant reinforced nylon material.

[0014] The invention discloses an application of a halogen-free flame-retardant reinforced nylon material. The halogen-free flame-retardant reinforced nylon material is applied to electrical, electronic and electric equipment components.

[0015] Compared with the prior art, the present invention provides a halogen-free flame retardant reinforced nylon material and a preparation method and application thereof, which have the following beneficial effects:

[0016] 1. Nano-silica has good hydrophobic effect, is suitable for high temperature, strong alkali and strong acid systems, and has good dispersibility in highly polar media;

[0017] 2. The nucleating agent is composed of inorganic nucleating agent activated calcium carbonate and organic nucleating agent sorbitol and its derivatives. Activated calcium carbonate is more conducive to improving the elongation at break of nylon materials due to its nano-scale particle size and strong interaction, and has a positive effect on flame retardant properties due to its high surface activity and strong interaction with nylon molecules;

[0018] 3. Polydimethylsiloxane is a silicone flame retardant and has good compatibility with nylon materials. While improving the flame retardant properties, it helps to improve the processing properties and mechanical strength of nylon, and may be beneficial to improving the elongation at break, helping to maintain the toughness of the material. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0020] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0021] Unless otherwise specified, the examples and comparative examples are parallel tests with the same components, component contents, preparation steps and preparation parameters. The experimental methods in the following examples are conventional methods unless otherwise specified. The experimental materials used in the following examples are analytical reagents (AR) unless otherwise specified, which are purchased from commercial channels.

[0022] Nano-montmorillonite was purchased from Zhejiang Fenghong New Materials Co., Ltd.; polyphenylene ether-isoprenol polyoxyethylene ether was purchased from Jiahua Chemical Co., Ltd., with a hydroxyl value of 21.40-25.40 mgKOH / g; polydimethylsiloxane was purchased from sigmaa ldr i ch, with a Mw of 95,000; nano-graphene was purchased from Jiangsu Xianfeng Nanomaterial Technology Co., Ltd., with a product number of XF0117782-42-5; sodium lignin sulfonate was purchased from sigmaa l dr i ch, with an average Mw of 52,000; PA6 resin was BASF B40L; and the thermoplastic elastomer was Kraton A1536HS; phosphorus-nitrogen modified silane is Xinyi Synthetic XY-AP100, purchased from Nanjing Xinyi Synthetic Technology Co., Ltd.; PE wax PE520 was purchased from Clariant of Germany; sorbitol-based transparent nucleating agent was purchased from Zibo Kunyu Chemical Co., Ltd. NA-JS03; nano calcium carbonate is Warner Nano Calcium CCS, purchased from Guangxi Warner New Materials Co., Ltd., hydroxyethyl ethylene bisstearamide (modified EBS, HEEBS) was purchased from Jiaxing Zhongcheng Environmental Protection Technology Co., Ltd.; active nano silicon oxide was purchased from Anhui IOTA Silicone Oil Co., Ltd. IOTA 90-01; dry para-aramid pulp was purchased from Zhongfang Special Fiber Co., Ltd., with an average length of 0.6-1.4 mm.

[0023] Example 1

[0024] 1. Preparation of halogen-free flame retardant: 4 parts of nano-montmorillonite, 26 parts of polyphenylene ether-isoprenol polyoxyethylene ether and 8 parts of polydimethylsiloxane were stirred and mixed at room temperature and 400 rpm for 4 hours to obtain halogen-free flame retardant.

[0025] 2. Pretreatment of nylon resin: 4 parts of γ-aminopropyltriethoxysilane (KH-550), 1 part of nanographene, 0.3 parts of sodium lignin sulfonate and 0.2 parts of sodium dodecyl sulfate were weighed by weight, added to ethanol, stirred at room temperature at a stirring speed of 500 rpm for 30 minutes, and a weak alkaline solution of sodium bicarbonate was added to adjust the pH value of the solution to 7.6. The solution was filtered through a 0.45 μm filter membrane to obtain a treatment solution, and nylon PA66 resin particles were immersed in the treatment solution at room temperature for 4 hours, and dried at 80°C for 4 hours to obtain the treated nylon resin.

[0026] 3. Preparation of halogen-free flame-retardant reinforced nylon material: 98 parts of nylon PA6 resin are added to the main material scale by weight, 16 parts of halogen-free flame retardant, 4 parts of synergist phosphorus-nitrogen modified silane, 8 parts of anti-precipitation agent PA612, 0.48 parts of calcium carbonate inorganic nucleating agent, 0.32 parts of sorbitol organic nucleating agent, 2.4 parts of hydroxyethyl ethylene bis stearic acid amide and 3.6 parts of nano silicon dioxide are added to the mixer as dispersant, and put into a high-speed mixer for melt mixing. During the melt mixing process, 2 parts of lubricant PE wax PE520 and 0.6 parts of antioxidant 1010 are gradually added, and evenly dispersed to form the main material, and 5 parts of reinforcing agent dry para-aramid pulp and 8 parts of toughening agent thermoplastic elastomer Kraton are added to the auxiliary material scale. A1536HS was added to the side feeding metering scale, the twin-screw extruder was started, and the main material and auxiliary material metering extruders were started in turn. After the material was discharged, the side feeding metering extruder was started. In the temperature control area (including the feed port, plasticizing zone, melting zone, homogenizing zone and die head zone) of the twin-screw extruder, the temperature was 80°C-250°C, the vacuum degree was 0.08MPa, and the extrusion speed was 800rpm. The heated, melt-blended and extruded were carried out. The strips were cooled by water and entered into the pelletizer for pelletizing at a speed of 1000rpm to form halogen-free flame-retardant reinforced nylon material.

[0027] Example 2

[0028] 1. Preparation of halogen-free flame retardant: 3 parts by weight of nano-montmorillonite, 25 parts of polyphenylene ether-isoprenol polyoxyethylene ether and 5 parts of polydimethylsiloxane were stirred and mixed at room temperature and 400 rpm for 4 hours to obtain halogen-free flame retardant.

[0029] 2. Pretreatment of nylon resin: 3 parts of γ-aminopropyltriethoxysilane (KH-550), 0.6 parts of nanographene, 0.1 parts of sodium lignin sulfonate and 0.1 parts of sodium dodecyl sulfate were weighed by weight, added to ethanol, stirred at room temperature at a stirring speed of 500 rpm for 30 minutes, and a weak alkaline solution of sodium bicarbonate was added to adjust the pH value of the solution to 7.6. The solution was filtered through a 0.45 μm filter membrane to obtain a treatment solution, and nylon PA66 resin particles were immersed in the treatment solution at room temperature for 4 hours, and dried at 80°C for 4 hours to obtain the treated nylon resin.

[0030] 3. Preparation of halogen-free flame-retardant reinforced nylon material: 95 parts of nylon PA6 resin are added to the main material scale by weight, 14 parts of halogen-free flame retardant, 3 parts of synergist phosphorus-nitrogen modified silane, 5 parts of anti-precipitation agent PA612, 0.12 parts of calcium carbonate inorganic nucleating agent, 0.08 parts of sorbitol organic nucleating agent, 2 parts of hydroxyethyl ethylene bisstearic acid amide and 3 parts of nano-silicon dioxide as dispersant are added to the mixer for mixing, and then put into a high-speed mixer for melt mixing. During the melt mixing process, 1 part of lubricant PE wax PE520 and 0.4 parts of antioxidant 1010 are gradually added, and evenly dispersed to form the main material, and then added to the auxiliary material scale, 3 parts of reinforcing agent dry para-aramid pulp and 5 parts of toughening agent thermoplastic elastomer Kraton A1536HS was added to the side feeding metering scale, the twin-screw extruder was started, and the main material and auxiliary material metering extruders were started in turn. After the material was discharged, the side feeding metering extruder was started. In the temperature control area (including the feed port, plasticizing zone, melting zone, homogenizing zone and die head zone) of the twin-screw extruder, the temperature was 80°C-250°C, the vacuum degree was 0.08MPa, and the extrusion speed was 800rpm. The heated, melt-blended and extruded were carried out. The strips were cooled by water and entered into the pelletizer for pelletizing at a speed of 1000rpm to form halogen-free flame-retardant reinforced nylon material.

[0031] Example 3

[0032] 1. Preparation of halogen-free flame retardant: 8 parts by weight of nano-montmorillonite, 30 parts of polyphenylene ether-isoprenol polyoxyethylene ether and 10 parts of polydimethylsiloxane were stirred and mixed at room temperature and 400 rpm for 4 hours to obtain halogen-free flame retardant.

[0033] 2. Pretreatment of nylon resin: 8 parts of γ-aminopropyltriethoxysilane (KH-550), 1.2 parts of nanographene, 0.4 parts of sodium lignin sulfonate and 0.3 parts of sodium dodecyl sulfate were weighed by weight, added to ethanol, stirred at room temperature at a stirring speed of 500 rpm for 30 minutes, and a weak alkaline solution of sodium bicarbonate was added to adjust the pH value of the solution to 7.6. The solution was filtered through a 0.45 μm filter membrane to obtain a treatment solution, and nylon PA66 resin particles were immersed in the treatment solution at room temperature for 4 hours, and dried at 80°C for 4 hours to obtain the treated nylon resin.

[0034] 3. Preparation of halogen-free flame-retardant reinforced nylon material: 100 parts of nylon PA6 resin are added to the main material scale by weight, 18 parts of halogen-free flame retardant, 8 parts of synergist phosphorus-nitrogen modified silane, 10 parts of anti-precipitation agent PA612, 0.48 parts of calcium carbonate inorganic nucleating agent, 0.32 parts of sorbitol organic nucleating agent, 3.2 parts of hydroxyethyl ethylene bis stearic acid amide and 4.8 parts of nano silicon dioxide as dispersant are added to the mixer for mixing, and then put into a high-speed mixer for melt mixing. During the melt mixing process, 4 parts of lubricant PE wax PE520 and 0.8 parts of antioxidant 1010 are gradually added and evenly dispersed to form the main material, and then 8 parts of reinforcing agent dry para-aramid pulp and 10 parts of toughening agent thermoplastic elastomer Kraton are added to the auxiliary material scale. A1536HS was added to the side feeding metering scale, the twin-screw extruder was started, and the main material and auxiliary material metering extruders were started in turn. After the material was discharged, the side feeding metering extruder was started. In the temperature control area (including the feed port, plasticizing zone, melting zone, homogenizing zone and die head zone) of the twin-screw extruder, the temperature was 80°C-250°C, the vacuum degree was 0.08MPa, and the extrusion speed was 800rpm. The heated, melt-blended and extruded were carried out. The strips were cooled by water and entered into the pelletizer for pelletizing at a speed of 1000rpm to form halogen-free flame-retardant reinforced nylon material.

[0035] Comparative Example 1

[0036] The difference from Example 1 is that an equal weight portion of halogen-free flame retardant is missing, and the other aspects are the same.

[0037] Comparative Example 2

[0038] The difference from Example 1 is that an equal weight portion of inorganic nucleating agent calcium carbonate is missing, and the other contents are the same.

[0039] Comparative Example 3

[0040] The difference from Example 1 is that an equal weight portion of the organic nucleating agent sorbitol is missing, and the other parts are the same.

[0041] Comparative Example 4

[0042] The difference from Example 1 is that an equal weight portion of hydroxyethyl ethylene bisstearic acid amide is missing, and the other contents are the same.

[0043] Comparative Example 5

[0044] The difference from Example 1 is that the lubricant PE wax PE520 is missing in equal parts by weight, and the rest is the same.

[0045] Comparative Example 6

[0046] The difference from Example 1 is that an equal weight portion of the reinforcing agent dry para-aramid pulp is missing, and the other contents are the same.

[0047] Performance Testing

[0048] The nylon materials prepared in the embodiments and comparative examples were tested. The products were injection molded into I-type strips for testing (molding process: melt temperature of 250-265°C, nozzle temperature of 270°C, molding pressure of 75MPa). The tensile test conditions were: tensile rate of 10mm / min, and the thickness of the test strips was 0.8mm when the vertical burning performance test was performed. The flame retardant grades were divided into V-0, V-1, V-2 and no grade. The results are shown in Table 1.

[0049] Table 1

[0050]

[0051] As can be seen from Table 1, Example 1 has the best performance, with a notched impact strength of up to 34 kJ / m 2 , the elongation at break is as high as 283%, and its flame retardant grade is V-0 while having good flexibility and ductility.

[0052] Application Examples 1-4 of a halogen-free flame-retardant reinforced nylon material:

[0053] The halogen-free flame-retardant reinforced nylon material embodiments 1-4 are respectively applied to electrical, electronic and electrical equipment components. After testing, the electrical, electronic and electrical equipment components all have excellent mechanical properties, flexibility and ductility, flame retardancy and stability.

[0054] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. If these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A halogen-free flame-retardant reinforced nylon material, characterized in that: The invention comprises the following components: nylon resin, halogen-free flame retardant, synergist, anti-precipitation agent, nucleating agent, dispersant, lubricant, antioxidant, reinforcing agent and toughening agent.

2. The halogen-free flame-retardant reinforced nylon material according to claim 1, characterized in that: The invention comprises the following components by weight: 95-100 parts of nylon resin, 14-18 parts of halogen-free flame retardant, 3-8 parts of synergist, 5-10 parts of anti-precipitation agent, 0.2-0.8 parts of nucleating agent, 5-8 parts of dispersant, 1-4 parts of lubricant, 0.4-0.8 parts of antioxidant, 3-8 parts of reinforcing agent and 5-10 parts of toughening agent.

3. The halogen-free flame-retardant reinforced nylon material according to claim 1, characterized in that: The halogen-free flame retardant comprises the following components and weight parts: 3-8 parts of nano-montmorillonite, 25-30 parts of polyphenylene ether-isoprenol polyoxyethylene ether and 5-10 parts of polydimethylsiloxane.

4. The halogen-free flame-retardant reinforced nylon material according to claim 3, characterized in that: The synergist is phosphorus-nitrogen modified silane XY-AP100 from Xinyi Synthesis, the anti-precipitation agent is PA612, the nucleating agent includes calcium carbonate inorganic nucleating agent and sorbitol organic nucleating agent, the dispersant includes hydroxyethyl ethylene bisstearic acid amide and nano-silica, the lubricant is PE wax PE520, the antioxidant is antioxidant 1010, the reinforcing agent is dry para-aramid pulp, and the toughening agent is thermoplastic elastomer Kraton A1536HS.

5. The halogen-free flame-retardant reinforced nylon material according to claim 4, characterized in that: The weight ratio of the inorganic nucleating agent of calcium carbonate to the organic nucleating agent of sorbitol is 3:2, and the weight ratio of the hydroxyethyl ethylene bisstearic acid amide to nano silicon dioxide is 2:

3.

6. A method for preparing the halogen-free flame-retardant reinforced nylon material as claimed in claim 1, characterized in that: The preparation method comprises preparing a halogen-free flame retardant, pretreating a nylon resin and preparing a halogen-free flame retardant reinforced nylon material.

7. The method for preparing the halogen-free flame-retardant reinforced nylon material according to claim 6, characterized in that: The step of preparing the halogen-free flame retardant is to stir and mix the nano-montmorillonite, polyphenylene ether-isoprenol polyoxyethylene ether and polydimethylsiloxane at room temperature and 400 rpm for 4 hours to obtain the halogen-free flame retardant.

8. The method for preparing the halogen-free flame-retardant reinforced nylon material according to claim 6, characterized in that: The step of pretreating the nylon resin comprises weighing 3-8 parts of γ-aminopropyltriethoxysilane (KH-550), 0.6-1.2 parts of nanographene, 0.1-0.4 parts of sodium lignin sulfonate and 0.1-0.3 parts of sodium dodecyl sulfate by weight, adding the mixture into ethanol, stirring the mixture at room temperature at a stirring speed of 500 rpm for 30 minutes, adding a weak alkaline solution of sodium bicarbonate to adjust the pH value of the solution to 7.6, filtering the mixture through a 0.45 μm filter membrane to obtain a treatment solution, immersing nylon PA66 resin particles in the treatment solution at room temperature for 4 hours, and drying the mixture at 80° C. for 4 hours to obtain the treated nylon resin.

9. The method for preparing the halogen-free flame-retardant reinforced nylon material according to claim 6, characterized in that: The steps of preparing the halogen-free flame retardant reinforced nylon material are as follows: adding nylon PA6 resin to a main material scale according to weight, adding a halogen-free flame retardant, a synergist phosphorus-nitrogen modified silane, PA612, calcium carbonate, sorbitol, hydroxyethyl ethylene bisstearic acid amide and nano silicon dioxide to a mixer for mixing, putting the mixture into a high-speed mixer for melting and mixing, adding PE wax PE520 and antioxidant 1010, uniformly dispersing the mixture to form a main material, adding an auxiliary material scale, dry para-aramid pulp and thermoplastic elastomer Kraton A1536HS was added to the side feeding metering scale, the twin-screw extruder was started, and the main material and auxiliary material metering extruders were started in turn. After the material was discharged, the side feeding metering extruder was started. In the temperature control area of ​​the twin-screw extruder, the temperature was 80℃-250℃, the vacuum degree was 0.08MPa, and the extrusion speed was 800rpm. The heated melt blending extrusion was carried out. The strips were cooled by water and entered into the pelletizer for pelletizing at a speed of 1000rpm to make halogen-free flame retardant reinforced nylon material.

10. An application of the halogen-free flame-retardant reinforced nylon material as claimed in claim 1, characterized in that: The halogen-free flame-retardant reinforced nylon material described in claim 1 is applied to electrical, electronic and appliance equipment components.

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