Total station packaging box antistatic hard material and preparation method thereof

Abstract

The invention relates to a total station packaging box antistatic hard material and a preparation method thereof, and belongs to the technical field of high polymer materials. The antistatic hard material for the packaging box of the total station is prepared by taking the ABS resin, the antioxidant, the lubricant, the initiator and the self-made permanent antistatic agent as raw materials, and the prepared permanent antistatic agent not only can provide good antistatic performance, but also can provide good flame retardance; the permanent antistatic agent has good compatibility with ABS resin, the use of the permanent antistatic agent does not cause the reduction of the mechanical properties of ABS resin groups, and the finally prepared antistatic hard material for the packaging box of the total station has good flame retardant property, antistatic property and impact toughness.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer materials, and in particular, relates to an antistatic ABS resin, and more particularly, to an antistatic hard material for a total station packaging box and a preparation method thereof. Background Art

[0002] With the advancement of surveying and mapping technology, total stations are used as high-precision electronic measuring equipment, and precision components such as photoelectric distance measurement systems, angle sensors and microprocessors are integrated into their interior. Such electronic components are extremely sensitive to electrostatic discharge (ESD). Although traditional packaging materials (such as ABS resin, PP resin, etc.) have good insulation properties, they are prone to static electricity during transportation friction. The working environment of total stations often involves dry and dusty outdoor scenes, which further aggravates the risk of static electricity accumulation. By adding antistatic agents, the surface resistance of the material can be reduced to play the role of leaking surface static charge. However, small molecule antistatic agents are easily invalidated as the use time migrates, and have higher requirements for environmental humidity. In dry environments, small molecule antistatic agents are difficult to play a good role. Although macromolecular antistatic agents have less demand for environmental humidity, the addition amount of macromolecular antistatic agents is large. Adding a large amount of macromolecular antistatic agents may cause the mechanical properties of the material to decline. To solve the above technical defects, the present invention provides a total station packaging box antistatic hard material and a preparation method thereof. Summary of the Invention

[0003] The object of the present invention is to provide an antistatic hard material for a total station packaging box and a preparation method thereof, so as to solve the problems mentioned in the above background technology.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] An antistatic hard material for a total station packaging box, comprising the following raw materials in parts by weight: 75-85 parts of ABS resin, 0.3-0.5 parts of an antioxidant, 0.4-0.6 parts of a lubricant, 0.03-0.04 parts of an initiator, and 16-24 parts of a permanent antistatic agent;

[0006] Furthermore, the initiator is dicumyl peroxide.

[0007] Furthermore, the antioxidant is compounded by antioxidant 1068 and antioxidant 168, and the mass ratio of antioxidant 1068 to antioxidant 168 is 4-5:5-6.

[0008] Furthermore, the lubricant is one of calcium stearate and zinc stearate.

[0009] Furthermore, the permanent antistatic agent is prepared by the following steps:

[0010] S1. Mix 4-vinylaniline, dimethyl phosphite, and iodine in a three-necked flask, start magnetic stirring, and react at room temperature for 30 to 60 minutes. After the reaction, remove excess dimethyl phosphite by rotary evaporation, wash the remaining solid with deionized water, and then dry to obtain a flame retardant;

[0011] S2, 1-allylimidazole, halohydrin, and acetonitrile were mixed in a three-necked flask, equipped with a condenser and a thermometer, and magnetic stirring was turned on. The mixture was reacted at a temperature of 40-80° C. for 8-24 h. After the reaction was completed, the solvent was removed by rotary evaporation, and the remaining solid was washed with ethyl acetate and dried to obtain a reactive quaternary ammonium salt;

[0012] S3. Mix the flame retardant, maleic anhydride, and N,N-dimethylformamide in a three-necked flask under nitrogen protection, install a condenser and a thermometer, start magnetic stirring, and dropwise add azobisisobutyronitrile N,N-dimethylformamide solution into the three-necked flask. After the addition is complete, react at a temperature of 45-65° C. for 6-10 hours. After the reaction is complete, pour the reaction solution into deionized water for precipitation, filter out the solid, wash it with deionized water, and dry it to obtain a macromolecular flame retardant.

[0013] S4. Mix the macromolecular flame retardant, reactive quaternary ammonium salt, p-toluenesulfonic acid and N,N-dimethylformamide in a three-necked flask, install a condenser and a thermometer, turn on the magnetic stirring, and react at a temperature of 80-110°C for 8-16 hours. After the reaction is completed, pour the reaction solution into deionized water for precipitation, then filter out the solid, wash it with deionized water and dry it to obtain a permanent antistatic agent.

[0014] Further, the halohydrin has the following structure Wherein X is one of Cl and Br, and 2≤n≤4.

[0015] Furthermore, the ratio of 4-vinylaniline, dimethyl phosphite and iodine used in S1 is 10-12:24-34:0.4-0.6 in parts by mass.

[0016] Furthermore, the ratio of 1-allylimidazole, halohydrin and acetonitrile used in S2 is 11-12:8-16:30-40 in parts by mass.

[0017] Furthermore, in parts by mass, the ratio of flame retardant, maleic anhydride, N,N-dimethylformamide and azobisisobutyronitrile used in S3 is 16-18:10-14:60-80:0.004-0.008, and the N,N-dimethylformamide solution of azobisisobutyronitrile is prepared by 0.004-0.008 parts by mass of azobisisobutyronitrile and 10-15 parts by mass of N,N-dimethylformamide.

[0018] Furthermore, in terms of mass fractions, the usage ratio of the macromolecular flame retardant, reactive quaternary ammonium salt, p-toluenesulfonic acid, and N,N-dimethylformamide in S4 is 20-24:14-16:0.06-0.08:80-100.

[0019] The invention also provides a method for preparing the antistatic hard material of the total station packaging box.

[0020] A method for preparing an antistatic hard material for a total station packaging box comprises the following steps:

[0021] The ABS resin is dried and put into a high-speed mixer together with an antioxidant, a lubricant, an initiator, and a permanent antistatic agent to mix evenly to obtain a mixture. The mixture is added into a twin-screw extruder for melt extrusion and granulation, and then injection molding is performed to obtain the antistatic hard material for the total station packaging box.

[0022] Furthermore, the temperature condition of melt extrusion is 200-220°C.

[0023] Beneficial effects of the present invention:

[0024] 1) The present invention uses 4-vinylaniline and dimethyl phosphite as raw materials, utilizes the amino group of 4-vinylaniline and the phosphorus-hydrogen bond of dimethyl phosphite to undergo a phosphonylation reaction under the catalytic action of elemental iodine to obtain a polymerizable flame retardant, then utilizes the nitrogen atom of 1-allylimidazole to react with the halogen atom in a halohydrin to produce a quaternary ammonium salt to obtain a reactive quaternary ammonium salt having a double bond and a hydroxyl group, then utilizes the double bond of the flame retardant and maleic anhydride to polymerize under the catalytic action of an initiator, azobisisobutyronitrile, to obtain a macromolecular flame retardant, and finally utilizes the carboxyl group generated by hydrolysis of the anhydride structure in the macromolecular flame retardant to undergo an esterification reaction with the hydroxyl group in the reactive quaternary ammonium salt under the catalytic action of p-toluenesulfonic acid to obtain a permanent antistatic agent. The permanent antistatic agent of the present invention has a quaternary ammonium salt structure and can form a conductive network on and inside the surface of the ABS resin, so that static charge can move along the conductive network on and inside the surface to achieve rapid dissipation of surface charge, effectively reduce the surface resistance of the ABS resin, and improve the antistatic performance of the ABS resin.

[0025] 2) ABS resin contains continuous styrene-acrylonitrile segments in the plastic phase and dispersed polybutadiene segments in the rubber phase. The chemical structures of the two phases differ significantly, resulting in poor compatibility. However, the permanent antistatic agent of the present invention comprises a benzene ring structure and a nitrogen heterocyclic structure provided by imidazole. The benzene ring structure is highly similar to the styrene structure in the plastic phase, while the nitrogen heterocyclic structure has strong polarity. This can enhance the compatibility of the permanent antistatic agent with the polar acrylonitrile structure in the plastic phase, achieving molecular fusion with the styrene-acrylonitrile segments in the plastic phase. Furthermore, the polymerizable double bonds in the structure of the permanent antistatic agent of the present invention can participate in a crosslinking reaction under the action of an initiator, improving compatibility with the polybutadiene segments in the rubber phase and bridging the plastic and rubber phases in the ABS resin. Using the permanent antistatic agent of the present invention not only avoids the problem of decreased mechanical properties caused by the addition of large amounts of macromolecular antistatic agents, but also acts as a bridge, enhancing the compatibility between the plastic and rubber phases in the ABS resin and improving the mechanical properties of the ABS resin.

[0026] 3) Phosphate ester flame retardants do not contain halogens and do not produce toxic gases when burned, making them safe and environmentally friendly. However, like permanent antistatic agents, phosphate ester flame retardants also have the disadvantage of requiring a large addition amount. The addition of a large amount of small-molecule phosphate ester flame retardants can cause phase separation within the matrix resin due to polarity differences, seriously affecting the mechanical properties of the ABS resin. The present invention integrates a large-molecule permanent antistatic agent with good compatibility with the flame retardant component at the molecular level, effectively eliminating the effect of adding a large amount of flame retardant on the mechanical properties of the ABS resin and reducing the migration of the flame retardant component within the matrix resin, thereby imparting long-lasting flame retardancy to the material. DETAILED DESCRIPTION

[0027] It should be understood that the expression "one or more of" includes individually each of the items recited after the expression and various combinations of two or more of the recited items, unless otherwise apparent from the context and usage. The expression "and / or" in conjunction with three or more recited items should be understood to have the same meaning, unless otherwise apparent from the context.

[0028] The terms "comprising", "having" or "containing", including their grammatical synonyms, should generally be understood as open and non-restrictive, e.g., not excluding other unrecited elements or steps, unless otherwise specifically stated or understood from the context.

[0029] It should be understood that the order of steps or the order in which certain actions are performed are not important as long as the present invention remains operable. Additionally, two or more steps or actions may be performed simultaneously.

[0030] The use of any and all examples or exemplary language, such as "such as" or "including," herein is intended merely to better illustrate the invention and does not limit the scope of the invention unless otherwise claimed. No language in this specification should be construed as indicating any non-claimed element as essential to the practice of the invention.

[0031] Example 1

[0032] An antistatic hard material for a total station packaging box, comprising the following raw materials in parts by mass: 75 parts of ABS resin, 0.3 parts of an antioxidant, 0.4 parts of a lubricant, 0.03 parts of an initiator, and 16 parts of a permanent antistatic agent;

[0033] The initiator is dicumyl peroxide, the antioxidant is compounded by 0.12 parts by mass of antioxidant 1068 and 0.18 parts by mass of antioxidant 168, the lubricant is calcium stearate, and the permanent antistatic agent is prepared by the following steps:

[0034] S1. Mix 10 parts by mass of 4-vinylaniline, 24 parts of dimethyl phosphite, and 0.4 parts of iodine in a three-necked flask, start magnetic stirring, and react at room temperature for 60 minutes. After the reaction, remove excess dimethyl phosphite by rotary evaporation, wash the remaining solid with deionized water, and then dry to obtain a flame retardant;

[0035] S2, by mass, 11 parts of 1-allylimidazole, 8 parts of 2-chloroethanol, and 30 parts of acetonitrile were mixed in a three-necked flask, a condenser and a thermometer were installed, magnetic stirring was turned on, and the reaction was carried out at a temperature of 40 ° C for 24 hours. After the reaction was completed, the solvent was removed by rotary evaporation, and the remaining solid was washed with ethyl acetate and dried to obtain a reactive quaternary ammonium salt;

[0036] S3. Mix 16 parts of flame retardant, 10 parts of maleic anhydride, and 60 parts of N,N-dimethylformamide in a three-necked flask under nitrogen protection, install a condenser and a thermometer, turn on magnetic stirring, and dropwise add a solution prepared by 0.004 parts of azobisisobutyronitrile and 10 parts of N,N-dimethylformamide into the three-necked flask. After the addition is complete, react at a temperature of 45°C for 10 hours. After the reaction is complete, pour the reaction solution into deionized water for precipitation, filter out the solid, wash it with deionized water, and then dry it to obtain a macromolecular flame retardant;

[0037] S4. Mix 20 parts of macromolecular flame retardant, 14 parts of reactive quaternary ammonium salt, 0.06 parts of p-toluenesulfonic acid and 80 parts of N,N-dimethylformamide in a three-necked flask, install a condenser and a thermometer, turn on magnetic stirring, and react at a temperature of 80°C for 16 hours. After the reaction is completed, pour the reaction solution into deionized water for precipitation, then filter out the solid, wash it with deionized water and dry it to obtain a permanent antistatic agent.

[0038] A method for preparing an antistatic hard material for a total station packaging box comprises the following steps:

[0039] The ABS resin is dried and put into a high-speed mixer together with an antioxidant, a lubricant, an initiator, and a permanent antistatic agent for uniform mixing to obtain a mixture. The mixture is added to a twin-screw extruder and melt-extruded and granulated at a temperature of 200°C, and then injection molded to obtain an antistatic hard material for a total station packaging box.

[0040] Example 2

[0041] An antistatic hard material for a total station packaging box, comprising the following raw materials in parts by mass: 85 parts of ABS resin, 0.5 parts of antioxidant, 0.6 parts of lubricant, 0.04 parts of initiator, and 24 parts of permanent antistatic agent;

[0042] The initiator is dicumyl peroxide, the antioxidant is compounded by 0.25 parts by mass of antioxidant 1068 and 0.25 parts by mass of antioxidant 168, the lubricant is zinc stearate, and the permanent antistatic agent is prepared by the following steps:

[0043] S1. Mix 12 parts by mass of 4-vinylaniline, 34 parts of dimethyl phosphite, and 0.6 parts of iodine in a three-necked flask, start magnetic stirring, and react at room temperature for 30 minutes. After the reaction, remove excess dimethyl phosphite by rotary evaporation, wash the remaining solid with deionized water, and then dry to obtain a flame retardant;

[0044] S2, by mass, 12 parts of 1-allylimidazole, 16 parts of 4-bromo-1-butanol, and 40 parts of acetonitrile were mixed in a three-necked flask, a condenser and a thermometer were installed, magnetic stirring was turned on, and the reaction was carried out at a temperature of 80 ° C for 8 hours. After the reaction was completed, the solvent was removed by rotary evaporation, and the remaining solid was washed with ethyl acetate and dried to obtain a reactive quaternary ammonium salt;

[0045] S3. Mix 18 parts of flame retardant, 14 parts of maleic anhydride, and 80 parts of N,N-dimethylformamide in a three-necked flask under nitrogen protection, install a condenser and a thermometer, turn on magnetic stirring, and dropwise add a solution prepared by 0.008 parts of azobisisobutyronitrile and 15 parts of N,N-dimethylformamide into the three-necked flask. After the addition is complete, react at a temperature of 65°C for 6 hours. After the reaction is complete, pour the reaction solution into deionized water for precipitation, filter out the solid, wash it with deionized water, and then dry it to obtain a macromolecular flame retardant;

[0046] S4. Mix 24 parts of macromolecular flame retardant, 16 parts of reactive quaternary ammonium salt, 0.08 parts of p-toluenesulfonic acid and 100 parts of N,N-dimethylformamide in a three-necked flask, install a condenser and a thermometer, turn on magnetic stirring, and react at a temperature of 110°C for 8 hours. After the reaction is completed, pour the reaction solution into deionized water for precipitation, then filter out the solid, wash it with deionized water and dry it to obtain a permanent antistatic agent.

[0047] A method for preparing an antistatic hard material for a total station packaging box comprises the following steps:

[0048] The ABS resin is dried and put into a high-speed mixer together with an antioxidant, a lubricant, an initiator, and a permanent antistatic agent to mix evenly to obtain a mixture. The mixture is added to a twin-screw extruder and melt-extruded and granulated at a temperature of 220° C. and then injection molded to obtain an antistatic hard material for a total station packaging box.

[0049] Example 3

[0050] An antistatic hard material for a total station packaging box, comprising the following raw materials in parts by mass: 80 parts of ABS resin, 0.4 parts of an antioxidant, 0.5 parts of a lubricant, 0.035 parts of an initiator, and 20 parts of a permanent antistatic agent;

[0051] The initiator is dicumyl peroxide, the antioxidant is compounded by 0.18 parts by mass of antioxidant 1068 and 0.22 parts by mass of antioxidant 168, the lubricant is calcium stearate, and the permanent antistatic agent is prepared by the following steps:

[0052] S1. Mix 11 parts of 4-vinylaniline, 29 parts of dimethyl phosphite, and 0.5 parts of iodine in a three-necked flask, start magnetic stirring, and react at room temperature for 45 minutes. After the reaction, remove excess dimethyl phosphite by rotary evaporation, wash the remaining solid with deionized water, and then dry to obtain a flame retardant;

[0053] S2, by mass, 11.5 parts of 1-allylimidazole, 12 parts of 3-chloro-1-propanol, and 35 parts of acetonitrile were mixed in a three-necked flask, a condenser and a thermometer were installed, magnetic stirring was turned on, and the reaction was carried out at a temperature of 60 ° C for 16 hours. After the reaction was completed, the solvent was removed by rotary evaporation, and the remaining solid was washed with ethyl acetate and dried to obtain a reactive quaternary ammonium salt;

[0054] S3. Mix 17 parts of flame retardant, 12 parts of maleic anhydride, and 70 parts of N,N-dimethylformamide in a three-necked flask under nitrogen protection, install a condenser and a thermometer, turn on magnetic stirring, and dropwise add a solution prepared by 0.006 parts of azobisisobutyronitrile and 12.5 parts of N,N-dimethylformamide into the three-necked flask. After the addition is complete, react at a temperature of 55°C for 8 hours. After the reaction is complete, pour the reaction solution into deionized water for precipitation, filter out the solid, wash it with deionized water, and then dry it to obtain a macromolecular flame retardant;

[0055] S4. Mix 22 parts of macromolecular flame retardant, 15 parts of reactive quaternary ammonium salt, 0.07 parts of p-toluenesulfonic acid and 90 parts of N,N-dimethylformamide in a three-necked flask, install a condenser and a thermometer, turn on magnetic stirring, and react at 95°C for 12 hours. After the reaction is completed, pour the reaction solution into deionized water for precipitation, then filter out the solid, wash it with deionized water and dry it to obtain a permanent antistatic agent.

[0056] A method for preparing an antistatic hard material for a total station packaging box comprises the following steps:

[0057] The ABS resin is dried and put into a high-speed mixer together with an antioxidant, a lubricant, an initiator, and a permanent antistatic agent to mix evenly to obtain a mixture. The mixture is added to a twin-screw extruder and melt-extruded and granulated at a temperature of 210°C, and then injection molded to obtain an antistatic hard material for a total station packaging box.

[0058] Comparative Example 1

[0059] The raw material "permanent antistatic agent" in Example 1 was replaced by 8 parts of commercially available macromolecular antistatic agent ABS-2MP and 8 parts of flame retardant DOPO, and the mass parts of the remaining raw materials and the preparation method of the antistatic hard material of the total station packaging box remained unchanged.

[0060] Comparative Example 2

[0061] The raw material "permanent antistatic agent" in Example 1 is removed, and the mass fractions of the remaining raw materials and the preparation method of the antistatic hard material of the total station packaging box remain unchanged.

[0062] Experimental Example 1

[0063] The antistatic hard materials for the total station packaging boxes prepared in Examples 1 to 3 and Comparative Example 1 were subjected to flame retardancy tests, impact resistance tests, and antistatic performance tests, respectively. The test results are shown in Table 1.

[0064] Flame retardant performance test: Refer to the national standard GB / T 2406-2008 "Plastic combustion performance test method oxygen index method" to test the limited oxygen index.

[0065] Impact resistance test: Refer to the national standard GB / T 1843-2008 "Determination of cantilever beam impact strength of plastics" to test the notched impact strength.

[0066] Antistatic performance test: Use a surface resistance tester to test the surface resistance of each component sample.

[0067] Table 1

[0068] project Limiting oxygen index LOI (%) <![CDATA[Notched impact strength (kJ / M 2 )]]> Surface resistance (Ω) Example 1 29.32 13.29 <![CDATA[1.8×10 10 <!-- 5 -->]]> Example 2 30.55 14.52 <![CDATA[1.3×10 10 ]]> Example 3 29.84 13.86 <![CDATA[1.6×10 10 ]]> Comparative Example 1 25.63 8.19 <![CDATA[2.3×10 10 ]]> Comparative Example 2 19.72 12.63 <![CDATA[1.4×10 16 ]]>

[0069] It can be seen from Table 1 that the antistatic hard material of the total station packaging box of the present invention in Examples 1 to 3 has good flame retardancy and impact strength, and the surface resistance is less than 10 11 Ω, which is an antistatic material. The antistatic hard material for the total station packaging box in Comparative Example 1, which is added with a commercially available antistatic agent and a flame retardant, also meets the antistatic material standard, but its flame retardant performance is weaker than that of the antistatic hard material for the total station packaging box of the present invention. The reason is that the flame retardant has poor compatibility with the ABS resin group, resulting in phase separation and uneven dispersion, and the addition of a large amount of antistatic agent and flame retardant leads to a decrease in notched impact strength. In summary, the antistatic hard material for the total station packaging box of the present invention has good flame retardant performance, antistatic performance, and good toughness, and is suitable for use as a total station packaging box.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An antistatic hard material for a total station packaging box, characterized in that: The invention comprises the following raw materials in parts by weight: 75 to 85 parts of ABS resin, 0.3 to 0.5 parts of antioxidant, 0.4 to 0.6 parts of lubricant, 0.03 to 0.04 parts of initiator, and 16 to 24 parts of permanent antistatic agent; Wherein, the permanent antistatic agent is prepared by the following steps: 4-vinylaniline, dimethyl phosphite and iodine are mixed and reacted at room temperature to obtain a flame retardant for use; 1-allylimidazole and halogenated alcohol are dissolved in acetonitrile and reacted at a temperature of 40-80°C to obtain a reactive quaternary ammonium salt for use; then, under nitrogen protection, the flame retardant and maleic anhydride are dissolved in N,N-dimethylformamide, azobisisobutyronitrile is added, and the mixture is reacted at a temperature of 45-65°C to obtain a macromolecular flame retardant; and then, the macromolecular flame retardant, reactive quaternary ammonium salt and p-toluenesulfonic acid are dissolved in N,N-dimethylformamide and reacted at a temperature of 80-110°C to obtain a permanent antistatic agent.

2. The antistatic hard material for a total station packaging box according to claim 1, characterized in that: The initiator is dicumyl peroxide, and the lubricant is one of calcium stearate and zinc stearate.

3. The antistatic hard material for a total station packaging box according to claim 1, characterized in that: The antioxidant is compounded by antioxidant 1068 and antioxidant 168, and the mass ratio of antioxidant 1068 to antioxidant 168 is 4-5:5-6.

4. The antistatic hard material for a total station packaging box according to claim 1, characterized in that: The halohydrin has the structure Wherein X is one of Cl and Br, and 2≤n≤4.

5. The antistatic hard material for a total station packaging box according to claim 1, characterized in that: Calculated by mass, the usage ratio of 4-vinylaniline, dimethyl phosphite and iodine used in S1 is 10-12:24-34:0.4-0.

6.

6. The antistatic hard material for a total station packaging box according to claim 1, characterized in that: Calculated by mass, the ratio of 1-allylimidazole to halogenated alcohol used in S2 is 11-12:8-16.

7. The antistatic hard material for a total station packaging box according to claim 1, characterized in that: Calculated by mass, the ratio of flame retardant, maleic anhydride and azobisisobutyronitrile used in S3 is 16-18:10-14:0.004-0.

008.

8. The antistatic hard material for a total station packaging box according to claim 1, characterized in that: Calculated by mass, the usage ratio of the macromolecular flame retardant, the reactive quaternary ammonium salt and the p-toluenesulfonic acid in S4 is 20-24:14-16:0.06-0.

08.

9. A method for preparing the antistatic hard material for a total station packaging box according to any one of claims 1 to 8, characterized in that: The following steps are involved: The ABS resin is dried and then stirred and mixed with an antioxidant, a lubricant, an initiator, and a permanent antistatic agent to obtain a mixture. The mixture is added into a twin-screw extruder for melt extrusion and granulation, and then injection molding is performed to obtain the antistatic hard material for the total station packaging box.

10. The method for preparing the antistatic hard material for a total station packaging box according to claim 9, characterized in that: The temperature condition for melt extrusion is 200 to 220°C.

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