Flame-retardant anti-static rubber sucker and preparation method thereof

Abstract

The invention relates to the technical field of sucker preparation, and discloses a flame-retardant anti-static rubber sucker and a preparation method thereof.The flame-retardant anti-static rubber sucker comprises a sucker body, a connecting column is fixedly connected to the top of the sucker body, an uncovering end is fixedly connected to the edge of the outer side face of the sucker body, and a conductive ring is arranged in the wall thickness of the connecting column; a conductive fiber net is fixedly connected to the edge of the bottom of the conductive ring, the conductive fiber net is located in the wall thickness of the suction cup, a connecting column is fixedly connected to the top of the conductive ring, and a connecting ring is fixedly connected to the top of the connecting column. According to the invention, polyaniline is coated on the surface of a graphene oxide sheet layer in an in-situ polymerization manner, and a connecting ring, a conductive fiber net, a conductive ring and a connecting column are matched, so that stable dispersion and long-acting conduction of an antistatic component in a rubber matrix are realized; the core defect that the anti-static performance is quickly attenuated along with the use time is overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of suction disc preparation, in particular to a flame-retardant and anti-static rubber suction disc and a preparation method thereof. BACKGROUND

[0002] As a core functional component in the fields of precise instrument carrying and electronic component assembly, the flame-retardant and anti-static rubber suction disc needs to meet the requirements of persistent flame retardancy, stable conductivity and safety. The current mainstream products realize functionalization by adding flame retardants and conductive fillers in the rubber matrix, but the synergistic effect and long-term service performance among the components still have significant defects.

[0003] Especially in terms of maintaining the anti-static function, the conventional technology generally adopts direct mixing of carbon black, metal powder or quaternary ammonium salt conductive agent. Such materials have poor interface compatibility with the rubber matrix, and the conductive filler is prone to migration and aggregation during use, resulting in irreversible decay of the product surface resistance value over time and mechanical stress. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a flame-retardant and anti-static rubber suction disc and a preparation method thereof, which solves the problem of irreversible decay of the product surface resistance value over time and mechanical stress due to the migration and aggregation of conductive fillers during use.

[0005] To achieve the above purpose, the present application realizes the following technical scheme: a flame-retardant and anti-static rubber suction disc, comprising a suction disc, a connecting column body fixedly connected to the top of the suction disc, a flange end head fixedly connected to the edge position of the outer side surface of the suction disc, a conductive ring arranged in the wall thickness of the connecting column body, a conductive fiber mesh fixedly connected to the edge position of the bottom of the conductive ring, the conductive fiber mesh being located in the wall thickness of the suction disc, a connecting column fixedly connected to the top of the conductive ring, and a connecting ring fixedly connected to the top of the connecting column.

[0006] Preferably, the suction disc and the connecting column body are vulcanized integrally, and the suction disc and the connecting column body adopt the following mass components:

[0007] 100 parts of a rubber matrix, 57-62 parts of a halogen-free flame-retardant system, 2-7 parts of a graphene oxide and polyaniline composite antistatic agent, wherein the mass ratio of graphene oxide to polyaniline is 1: (0.8-1.5), 2.2-5.2 parts of an anti-aging agent, 1.2-3.0 parts of a processing aid, and 2.3-4.5 parts of a vulcanizing agent;

[0008] In the composite antistatic agent, polyaniline is in-situ coated on the surface of the graphene oxide sheet.

[0009] Preferably, the raw material of the halogen-free flame-retardant system is a mixture of magnesium hydroxide, encapsulated ammonium polyphosphate and zinc borate, the anti-aging agent is a mixture of hindered phenolic antioxidant, microcrystalline wax and benzotriazole ultraviolet absorber, the processing aid is a mixture of ionic liquid and polyethylene glycol, and the vulcanizing agent is a mixture of sulfur and accelerator.

[0010] A preparation method of a flame-retardant antistatic rubber suction cup, the preparation method comprising the following steps:

[0011] S1, graphene oxide is added to water and ultrasonically dispersed to form a uniform suspension, then silane coupling agent KH-550 is added to the suspension and stirred, followed by the addition of aniline monomer and mixing to form a preliminary mixture, ammonium persulfate aqueous solution is added dropwise to the preliminary mixture, and the reaction is carried out at room temperature for 6-8 hours, after filtration, repeated washing is carried out until the filtrate is neutral, and finally vacuum drying at 60℃ and crushing to a particle size of ≤50μm to obtain graphene oxide and polyaniline composite powder;

[0012] S2, further using two-stage rubber mixing, in the first stage, the rubber matrix, halogen-free flame-retardant system, vulcanizing agent and anti-aging agent are added to the internal mixer, and mixed at 75-85℃ and 40-60rpm for 4-6 minutes, and in the second stage, after the temperature in the internal mixer is reduced to 55-65℃, the graphene oxide and polyaniline composite powder obtained in S1 and the processing aid are added, and mixed for 7-10 minutes to obtain a mixed rubber;

[0013] S3, first, the connecting ring, conductive fiber net, conductive ring and connecting column are placed in the suction cup mold, then the mixed rubber is injected into the suction cup mold preheated to 80-100℃, so that the mixed rubber covers the conductive fiber net and the conductive ring as a whole, and covers part of the connecting column, and at 160-170℃, first vulcanization is carried out at a pressure of 5-8MPa for 2 minutes, and then vulcanization is carried out at a pressure of 15-20MPa for 6-10 minutes;

[0014] S4, after the preliminary vulcanization time is reached, the suction cup is demolded, and after demolding, it is immersed in an ice water bath at 0-5℃ for 10-15 seconds, and then two-stage vulcanization is carried out in an oven at 115-125℃ for 1.5-2.5 hours

[0015] Preferably, in S2, the preparation method of the halogen-free flame-retardant system comprises the following steps:

[0016] S2011, melamine is mixed with formaldehyde solution, and reacted at 60-65℃, the pH is adjusted to 8.5-9.0 to generate a transparent prepolymer, then ammonium polyphosphate is dispersed in water to form a slurry, the temperature is raised to 70℃, the prepolymer is added dropwise to the slurry, the temperature is raised to 85℃ at a rate of 0.5℃ / min, and the reaction is carried out for 2 hours, the reaction liquid is cooled to room temperature, filtered and washed with water until neutral, and dried at 80℃ to obtain encapsulated ammonium polyphosphate;

[0017] S2012, magnesium hydroxide powder is added into a high-speed mixer, preheated to 80°C for 10 minutes, sprayed with an ethanolic solution of stearic acid, treated at a speed of 1200 rpm for 15 minutes, and sieved through a 200-mesh sieve after discharging to obtain hydrophobic magnesium hydroxide;

[0018] S2013, the encapsulated ammonium polyphosphate, modified magnesium hydroxide and zinc borate are added into a three-dimensional mixer, and inert gas is injected into the three-dimensional mixer, and the three preparations are dry-mixed at a speed of 30 rpm for 20 minutes under the protection of inert gas to obtain a uniform composite flame-retardant powder.

[0019] Preferably, in S2, the preparation method of the anti-aging agent comprises the following steps:

[0020] S2021, the hindered phenol antioxidant and the benzotriazole ultraviolet absorber are added into acetone, dissolved by stirring at 60°C, and microcrystalline wax fragments are added, and the stirring is continued until complete transparency;

[0021] S2022, the mixed solution is poured into ethanol at -10°C, high-speed sheared and emulsified at 5000 rpm, the precipitate is collected by filtration, vacuum dried at 40°C for 12 hours, and melt-extruded at 70°C by a twin-screw extruder to obtain a master batch with a diameter of 1-2 mm by underwater pelletization.

[0022] Preferably, in S2, the preparation method of the processing aid comprises the following steps:

[0023] S2031, the ionic liquid is passed through an alumina chromatographic column to remove free halide ions, vacuum dehydrated at 80°C for 4 hours, and the water content is measured to be ≤50 ppm;

[0024] S2032, nitrogen gas is bubbled into polyethylene glycol for 30 minutes to remove dissolved oxygen, and molecular sieves are added for storage;

[0025] S2033, the purified ionic liquid and deoxygenated polyethylene glycol are put into a mixing tank according to the volume ratio, and ultrasonic treatment is performed for 5 minutes to obtain a homogeneous transparent liquid.

[0026] Preferably, in S2, the preparation method of the vulcanizing agent comprises the following steps:

[0027] S2041, sublimed sulfur is treated by an air flow pulverizer, and 1-5 μm ultrafine sulfur powder is collected by classification;

[0028] S2042, the accelerator and zinc stearate are put into a high-speed mixer, treated at 110°C and 2000 rpm for 10 minutes, and cooled to obtain coated accelerator;

[0029] S2043, the micro-powder sulfur, coated accelerator and zinc oxide are added into an internal mixer, mixed at 60°C for 3 minutes, and pressed into 1 mm particles to obtain a vulcanizing agent.

[0030] Preferably, the conductive fiber net adopts silver-plated polyester fiber, and a silver layer with a thickness of 0.5-1 μm is uniformly plated on the surface of the polyester fiber through a chemical silver plating process;

[0031] The chemical silver plating process is that the polyester fiber is first immersed in a sodium hydroxide solution for surface roughening for 10 minutes, then washed with water, immersed in a plating solution mixed by silver nitrate solution and glucose solution with a volume ratio of 1:2, and reacted at room temperature for 30 minutes, and then washed with water and dried.

[0032] The application provides a kind of flame-retardant anti-static rubber suction disc and preparation method thereof.

[0033] 1、The application realizes the stable dispersion and long-term conduction of the antistatic component in the rubber matrix by in-situ polymerization of polyaniline on the surface of graphene oxide sheet layer, and cooperates with the connecting ring, conductive fiber net, conductive ring and connecting column.

[0034] 2、The application forms a halogen-free flame-retardant synergistic network based on the slow-release characteristics of encapsulated ammonium polyphosphate, the enhanced inhibition ability of hydrophobic modified magnesium hydroxide and the synergistic carbonation of zinc borate, which overcomes the mechanical performance degradation and other problems caused by high addition amount compared with the traditional single flame retardant addition scheme.

[0035] 3、The application innovatively uses deep-purified ionic liquid and deoxygenated polyethylene glycol to compound as a processing aid to ensure uniform dispersion of the nanocomposite in a high-viscosity system, which eliminates the process bottleneck of incomplete conductive network construction in the internal conductive network of the rubber compound. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a perspective view of the flame-retardant anti-static rubber suction disc of the application;

[0037] Figure 2 It is a cross-sectional view of the flame-retardant anti-static rubber suction disc of the application.

[0038] 1、suction disc; 2、connecting column; 3、exposed end; 4、connecting ring; 5、conductive fiber net; 6、conductive ring; 7、connecting column. DETAILED DESCRIPTION

[0039] The technical solutions of the present application will be described clearly and completely below in combination with the drawings of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0040] Please refer to the drawings of the present application Figure 1 and the drawings of the present application Figure 2 The present application provides a kind of fire-retardant antistatic rubber suction cup, including suction cup 1, suction cup 1 top is fixedly connected with connecting column body 2, suction cup 1 outer side edge position is fixedly connected with uncovering face end 3, connecting column body 2 wall thickness is provided with conductive ring 6, the bottom edge position of conductive ring 6 is fixedly connected with conductive fiber network 5, conductive fiber network 5 is located in the wall thickness of suction cup 1, the top of conductive ring 6 is fixedly connected with connecting column 7, and connecting column 7 top is fixedly connected with connecting ring 4.

[0041] Specifically, suction cup 1 as core adsorption component, directly with adsorption surface contact, connecting column body 2 is used to connect suction cup 1 with external equipment, provides structural support, uncovering face end 3 is convenient to take down suction cup 1 from adsorption surface, easily uncover suction cup 1, improve use convenience;

[0042] Conductive ring 6, conductive fiber network 5, connecting column 7 and connecting ring 4 constitute the path of static electricity, can quickly export the static electricity generated on the surface of rubber suction cup 1, avoid static electricity accumulation to cause security risk or influence equipment operation

[0043] Suction cup 1 and connecting column body 2 are vulcanized integrally, and suction cup 1 and connecting column body 2 adopt the following mass components:

[0044] Rubber matrix 100 parts, halogen-free flame-retardant system 57-62 parts, graphene oxide and polyaniline composite antistatic agent 2-7 parts, wherein the mass ratio of graphene oxide and polyaniline is 1: (0.8-1.5), anti-aging agent 2.2-5.2 parts, processing aid 1.2-3.0 parts, vulcanizing agent 2.3-4.5 parts;

[0045] Polyaniline in composite antistatic agent is in-situ coated on the surface of graphene oxide sheet.

[0046] Specifically, the vulcanization ensures the structural integrity, avoids the parts from falling off, and the rubber matrix provides elasticity as a basic material.

[0047] The halogen-free flame-retardant system gives the rubber flame-retardant property, releases water vapor to dilute oxygen during combustion, and inhibits the spread of fire.

[0048] The graphene oxide and polyaniline composite antistatic agent forms a conductive network to reduce the surface resistance and realize the antistatic function.

[0049] Anti-aging agent delays aging of rubber, prolongs service life;

[0050] Processing aid improves processing performance and improves production efficiency; vulcanizing agent promotes crosslinking reaction of rubber to enhance mechanical properties.

[0051] The raw material of the halogen-free flame-retardant system is a mixture of magnesium hydroxide, encapsulated ammonium polyphosphate and zinc borate, the anti-aging agent is a mixture of hindered phenolic antioxidant, microcrystalline wax and benzotriazole ultraviolet absorber, the processing aid is a mixture of ionic liquid and polyethylene glycol, and the vulcanizing agent is a mixture of sulfur and accelerator.

[0052] Specifically, magnesium hydroxide decomposes endothermically and releases water vapor upon heating, encapsulated ammonium polyphosphate decomposes to produce phosphoric acid and polyphosphoric acid to form a carbon layer, and zinc borate promotes the formation of a carbon layer, all of which synergistically retard flame;

[0053] Hindered phenolic antioxidant captures free radicals, microcrystalline wax forms a protective film on the surface of the rubber, and benzotriazole ultraviolet absorber absorbs ultraviolet light, all of which work together to resist aging;

[0054] Ionic liquid reduces viscosity, and polyethylene glycol improves flowability; sulfur provides sulfur atoms, and accelerators speed up vulcanization speed and reduce vulcanization temperature.

[0055] The application discloses a preparation method of a flame-retardant anti-static rubber suction cup.

[0056] S1, graphene oxide is added to water and ultrasonically dispersed to form a uniform suspension, then silane coupling agent KH-550 is added to the suspension and stirred, followed by mixing with aniline monomer to form a preliminary mixture, ammonium persulfate aqueous solution is added dropwise to the preliminary mixture, and the reaction is carried out at room temperature for 6-8 hours, after filtration, the filtrate is repeatedly washed until it is neutral, finally vacuum drying at 60°C and crushing to a particle size of ≤50μm to obtain graphene oxide and polyaniline composite powder;

[0057] S2, further two-stage rubber mixing is adopted, wherein in the first stage, the rubber matrix, halogen-free flame-retardant system, vulcanizing agent and anti-aging agent are added to the internal mixer, and mixing is carried out at 75-85°C and 40-60rpm for 4-6 minutes, and in the second stage, after the temperature in the internal mixer is reduced to 55-65°C, the graphene oxide and polyaniline composite powder obtained in S1 and the processing aid are added, and mixing is carried out for 7-10 minutes to obtain a mixed rubber;

[0058] S3, first, the connecting ring 4, the conductive fiber web 5, the conductive ring 6 and the connecting column 7 are placed in the suction cup mold, then the rubber compound is injected into the suction cup mold preheated to 80-100 DEG C, so that the rubber compound covers the conductive fiber web 5 and the conductive ring 6 as a whole, and a part of the connecting column 7 is covered, and at 160-170 DEG C, first vulcanized at a pressure of 5-8 MPa for 2 minutes, then raised to 15-20 MPa pressure for 6-10 minutes;

[0059] S4, after the preliminary vulcanization time arrives, the suction cup is demolded, and after demolding, it is immersed in an ice water bath at 0-5 DEG C for 10-15 seconds, and then two-stage vulcanization is carried out in an oven at 115-125 DEG C for 1.5-2.5 hours.

[0060] Specifically, ultrasonic dispersion ensures uniform dispersion of graphene oxide, and silane coupling agent enhances compatibility with the rubber matrix; aniline is polymerized and coated on graphene oxide under the action of ammonium persulfate to form a composite antistatic agent, and the particle size is controlled to ensure uniform dispersion in the rubber matrix, fully exerting the antistatic effect;

[0061] The first high-temperature mixing makes the rubber matrix and most of the raw materials preliminarily mixed uniformly; the second low-temperature addition of antistatic agent and processing aid avoids high-temperature decomposition of the antistatic agent, ensures its activity, and at the same time, the processing aid improves the flowability of the rubber compound, facilitating subsequent molding;

[0062] Preheating the mold makes the rubber compound vulcanize quickly, and stepwise pressure vulcanization ensures that the rubber is fully filled in the mold, tightly combined with the conductive parts, forms a stable conductive structure and a firm overall structure, and ensures the performance of the suction cup;

[0063] Ice water bath quenching fixes the rubber molecular chain structure and prevents deformation; two-stage vulcanization further completes the crosslinking reaction, improves the hardness, strength and aging resistance of the rubber, and improves the comprehensive performance of the suction cup.

[0064] In the formula, the ratio of graphene oxide and polyaniline composite antistatic agent affects as follows:

[0065] The formula variables are tested with the fixed flame-retardant system of 60 parts and the rubber matrix of 100 parts.

[0066] Total parts of antistatic agent Graphene oxide: polyaniline Surface resistance (Ω) Resistance attenuation rate after 10,000 cycles Tear strength (kN / m) 2 parts 1:0.8 2.1 x 10 9 ]]> +16% 37.3 5 parts 1:1.2 4.6 x 10 7 ]] +8% 35.2 7 parts 1:1.5 8.9 x 10 6 ]] +6% 33.1

[0067] Test conditions: resistance decay rate: resistance change rate after 10,000 mechanical cycles;

[0068] When the proportion of polyaniline is greater than or equal to 1.2, the conductive network is more stable, but excessive (7 parts) will cause the hardness of the rubber to rise.

[0069] S2, the preparation method of the halogen-free flame-retardant system comprises the following steps:

[0070] S2011, melamine and formaldehyde solution is mixed, and the reaction is carried out at 60-65 DEG C, the pH is adjusted to 8.5-9.0, a transparent prepolymer is generated, then ammonium polyphosphate is dispersed in water to form a slurry, the temperature is raised to 70 DEG C, the prepolymer is added dropwise to the slurry, the temperature is raised to 85 DEG C at 0.5 DEG C / min, and the reaction is carried out for 2 hours, the reaction solution is cooled to room temperature, filtered, washed with water to neutral, and dried at 80 DEG C to obtain encapsulated ammonium polyphosphate;

[0071] S2012, magnesium hydroxide powder is added to a high-speed mixer, preheated to 80 DEG C for 10 minutes, and sprayed with a mist of stearic acid ethanol solution, treated at 1200 rpm for 15 minutes, and screened through a 200 mesh sieve after discharging to obtain hydrophobic magnesium hydroxide;

[0072] S2013, the encapsulated ammonium polyphosphate, modified magnesium hydroxide and zinc borate are added to a three-dimensional mixer, and inert gas is injected into the three-dimensional mixer, and the three preparations are dry-mixed at 30 rpm for 20 minutes under the protection of inert gas to obtain a uniform composite flame-retardant powder.

[0073] Specifically, melamine and formaldehyde shell delay the decomposition of ammonium polyphosphate at high temperature, prolong the flame-retardant effect time, stearic acid coating reduces the surface energy of magnesium hydroxide, improves the dispersibility in rubber, prevents zinc borate from absorbing moisture and caking, and ensures the uniformity of the flame-retardant components.

[0074] The test is carried out with 100 parts of fixed rubber matrix and the remaining components as follows:

[0075] Total parts of flame-retardant system Magnesium hydroxide: encapsulated ammonium polyphosphate: zinc borate Oxygen index (OI) UL94 rating Tensile strength (MPa) 57 parts 25:25:7 30% V-1 12.5 60 parts (preferably) 30:22:8 34% V-0 11.8 62 parts 35:20:7 35% V-0 10.2

[0076] Key conclusions:

[0077] When the total amount of flame retardant is 60 parts, the flame-retardant system test structure of 30:22:8 is relatively optimal, and the oxygen index and mechanical properties are balanced best (OI≥34%, tensile strength > 11 MPa);

[0078] If the proportion of magnesium hydroxide is too high (such as 35 parts), the material brittleness increases.

[0079] In summary, the halogen-free flame-retardant system with a configuration ratio of 30:22:8 is relatively suitable, and the remaining ratios can also meet the use requirements.

[0080] In S2, the preparation method of the anti-aging agent comprises the following steps:

[0081] S2021, the hindered phenol antioxidant, benzotriazole ultraviolet absorber is added to acetone, and is dissolved by stirring at 60℃. Microcrystalline wax fragments are added, and continue to stir until completely transparent; wherein the hindered phenol antioxidant accounts for 45%-60% of the total mass, the benzotriazole ultraviolet absorber accounts for 10%-15% of the total mass, the acetone accounts for 25%-35% of the total mass, and the microcrystalline wax fragments account for 6%-15% of the total mass; preferably, the hindered phenol antioxidant accounts for 52% of the total mass, the benzotriazole ultraviolet absorber accounts for 13% of the total mass, the acetone accounts for 28% of the total mass, and the microcrystalline wax fragments account for 7% of the total mass.

[0082] S2022, the mixed solution is poured into ethanol at -10℃, and is emulsified by high-speed shearing at 5000 rpm. The precipitate is collected by filtration, vacuum dried at 40℃ for 12 hours, and melt-extruded by a double-screw extruder at 70℃. The diameter of the obtained master batch is 1-2 mm.

[0083] Specifically, the dissolution and mixing uniformly disperse the anti-aging components, the low-temperature emulsification forms stable particles, the vacuum drying and the pelletizing facilitate the addition and dispersion in rubber mixing, and the anti-aging effect is improved.

[0084] In S2, the preparation method of the processing aid includes the following steps:

[0085] S2031, the ionic liquid is passed through an alumina chromatographic column to remove free halide ions, vacuum dewatered at 80℃ for 4 hours, and the water content is measured to be ≤50 ppm;

[0086] S2032, nitrogen gas is bubbled into the polyethylene glycol for 30 minutes to remove dissolved oxygen, and the molecular sieve is added for storage;

[0087] S2033, the purified ionic liquid and the deoxygenated polyethylene glycol are put into a mixing tank at a volume ratio of 1:3-5, and ultrasonic treatment is performed for 5 minutes to obtain a homogeneous transparent liquid.

[0088] Specifically, the purified ionic liquid and the deoxygenated polyethylene glycol remove impurities and active ingredients, avoid affecting the performance of rubber, ultrasonic mixing ensures uniform mixing of the two, and improves the effect of the processing aid in rubber mixing.

[0089] In S2, the preparation method of the vulcanizing agent includes the following steps:

[0090] S2041, the sublimed sulfur is treated by an air flow pulverizer, and the 1-5 μm ultrafine sulfur powder is collected by classification;

[0091] S2042, the accelerator and zinc stearate are put into a high-speed mixer at a weight ratio of 1:0.4-1, treated at 110℃ and 2000 rpm for 10 minutes, and cooled to obtain coated accelerator;

[0092] S2043, add micronized sulfur, coating accelerator and zinc oxide in a weight ratio of 1-3:2-4:3-5 into a mixer, mix at 60°C for 3 minutes, and then press into tablets and crush into 1mm particles to form a vulcanizing agent.

[0093] Specifically, ultrafine sulfur powder increases the contact area with rubber, improving vulcanization efficiency; accelerator coating prevents premature decomposition; and mixed preparation of vulcanizing agent ensures uniform dispersion of each component, making the rubber vulcanization reaction more complete and improving product quality.

[0094] The conductive fiber mesh 5 is made of silver-plated polyester fiber, and a silver layer with a thickness of 0.5-1μm is uniformly plated on the surface of the polyester fiber through a chemical silver plating process.

[0095] The chemical silver plating process involves first immersing polyester fibers in a sodium hydroxide solution for 10 minutes to roughen the surface, then rinsing them with water and immersing them in a plating solution made of silver nitrate solution and glucose solution in a volume ratio of 1:2. The mixture is then reacted at room temperature for 30 minutes, rinsed with water, and dried.

[0096] Specifically, surface roughening increases the surface roughness of the fiber, improves the adhesion of the silver plating layer, and chemical silver plating gives the polyester fiber excellent conductivity, enabling it to build a stable conductive channel within the rubber suction cup and quickly dissipate static electricity.

[0097] In the process of roughening the surface of polyester fibers, the concentration of sodium hydroxide solution used is 5-10 wt% (preferably 8 wt%); the treatment temperature is 25-40℃ (room temperature is acceptable); the treatment time is 10-15 minutes; the subsequent treatment is to rinse with deionized water until neutral (pH=7) after roughening, and then dry at 60℃ for 30 minutes.

[0098] Furthermore, in the above chemical silver plating solution formulation, the concentration of silver nitrate solution is 3-5 g / L (main salt, providing silver ions); the concentration of glucose solution is 20-30 g / L (reducing agent); the volume ratio of plating solution is silver nitrate solution: glucose solution = 1:2 (V / V); pH adjustment: adjust the pH of the plating solution to 9.0-10.5 with ammonia (optimal pH = 9.5); stabilizer: 0.1-0.5 g / L of thiourea or disodium EDTA can be added as a stabilizer to prevent the plating solution from self-decomposing.

[0099] Chemical plating reaction conditions include: reaction temperature: 20-30℃ (room temperature reaction, to avoid rapid failure of the plating solution due to high temperature); reaction time: 30-45 minutes (to ensure a silver layer thickness of 0.5-1 μm); stirring method: mechanical stirring (100-200 rpm) or ultrasonic assistance (40 kHz) to ensure coating uniformity.

[0100] Post-plating treatment: Silver-plated fibers need to be rinsed with deionized water 3 times and dried at 80℃ for 1 hour.

[0101] Based on the above definition, the electroless silver plating process is as follows: the polyester fiber is immersed in an 8 wt% sodium hydroxide solution, treated at 30°C for 12 minutes, washed with water to neutral and dried;

[0102] Prepare the plating solution: mix the silver nitrate solution (4 g / L) with the glucose solution (25 g / L) at a volume ratio of 1:2, add ammonia water to adjust the pH to 9.5, and add 0.2 g / L EDTA disodium;

[0103] After roughening, the fiber is immersed in the plating solution and mechanically stirred at 150 rpm for 40 minutes at 25°C;

[0104] After the reaction is complete, the fiber is rinsed with deionized water, dried at 80°C, and the silver layer thickness is measured to be 0.8 μm, with a surface resistance of 0.8 Ω / sq.

[0105] After the above process, the silver layer thickness is verified by SEM or X-ray fluorescence thickness meter, meeting the requirements of 0.5-1 μm; the surface resistance is tested by the four-probe method, meeting the requirements of ≤1 Ω / sq; through the adhesion test, the grade meets the 4B level (the peeled area after tape peeling is ≤5%) according to ASTM D3359 standard.

[0106] The conductive ring 6 and the connecting column 7 are made of stainless steel, which can be effectively treated to improve the bonding performance of stainless steel and rubber. The specific treatment method includes the following steps:

[0107] First, the required substances and conditions for treatment are introduced and defined, among which the carbon nanotube dispersion liquid uses carbon nanotubes, specifically multi-walled carbon nanotubes (MWCNTs) with a diameter of 10-20 nm, a length of 1-10 μm, and a purity of >95%; the dispersing agent is sodium dodecylbenzenesulfonate (SDBS) or polyvinylpyrrolidone (PVP); the dispersion liquid concentration is 0.3-0.5 wt% (preferably 0.4 wt%); the solvent is deionized water or an ethanol / water mixed solution (ethanol accounts for ≤20%); the dispersion method is ultrasonic treatment (power 300 W, frequency 40 kHz) for 30-60 minutes, and centrifugation (5000 rpm, 10 minutes) to remove undispersed agglomerates.

[0108] Catalyst type and concentration introduction: the catalyst is nickel chloride (NiCl2) or silver nitrate (AgNO3), and the catalyst concentration is 0.05-0.1 mol / L (preferably 0.07 mol / L); reducing agent (optional), if needed to enhance the deposition rate of carbon nanotubes, 0.01-0.05 mol / L of sodium hypophosphite (NaH2PO2) can be added.

[0109] Reaction conditions: pH value is adjusted to 4.0-6.0 (use dilute hydrochloric acid or ammonia water to adjust, avoid strong alkaline leading to carbon nanotube hydrolysis); reaction temperature is 80-85℃ (water bath temperature control ±1℃); reaction time is 2-3 hours (to ensure the carbon nanotube directional growth to form a continuous layer); stirring speed is 100-200 rpm (mechanical stirring, to avoid vortex leading to uneven deposition); inert gas protection is nitrogen (N2) or argon (Ar), flow rate is 0.5-1 L / min, to prevent oxidation.

[0110] Surface pretreatment (enhancing the bonding force) is introduced: silane coupling agent solution KH-560 (γ-glycidoxypropyltrimethoxysilane) is used, concentration is 1-2 wt% ethanol solution; dipping time is 10-15 minutes; curing condition is 120℃ drying for 30 minutes, to form a transition layer modified by epoxy group.

[0111] Performance verification standards include:

[0112] 1. Conductive layer thickness: 1-2 μm (SEM cross-section measurement);

[0113] 2. Surface resistance: ≤10 Ω / sq (four-probe method);

[0114] 3. Adhesion: pass the cross-hatch test (ASTM D3359), reaching 4B level;

[0115] 4. Corrosion resistance: salt spray test (5% NaCl, 35℃) for 48 hours, resistance change rate ≤10%

[0116] Based on the above conditions and detection methods, the conductive ring 6 and the connecting column 7 stainless steel parts are sequentially degreased with acetone, pickled with 10% hydrochloric acid for 5 minutes, washed with water and dried; then dipped in 1.5 wt% KH-560 ethanol solution for 12 minutes, and cured at 120℃ for 30 minutes;

[0117] Then prepare the carbon nanotube dispersion: 0.4 wt% multi-walled carbon nanotubes (diameter 15 nm) and 0.1 wt% sodium dodecylbenzenesulfonate are ultrasonically dispersed in deionized water for 40 minutes to obtain a dispersion;

[0118] 0.07 mol / L nickel chloride catalyst is added to the dispersion, and the pH is adjusted to 5.0 with hydrochloric acid;

[0119] The pretreated stainless steel parts are immersed in the reaction solution, stirred at 150 rpm at 85℃ for 2.5 hours, and protected by nitrogen gas; finally, the stainless steel parts are taken out and washed with water and dried, the conductive layer thickness is 1.5 μm, the surface resistance is 8 Ω / sq, and the cross-hatch test is 4B level.

[0120] In the above processing method, the silane coupling agent (KH-560) treatment can form an epoxy group modified layer on the surface of the stainless steel, enhancing the chemical bonding with the rubber; and avoiding the directional growth of carbon nanotubes to provide a rough surface, increasing the mechanical embedding effect. Thus, during the vulcanization process, the rubber molecular chain and the stainless steel surface are covalently crosslinked under high pressure (15-20 MPa) and high temperature (160-170°C).

[0121] The above treated stainless steel provides multiple adhesion mechanisms to achieve good stainless steel and rubber bonding effect:

[0122] 1. Chemical bonding: the epoxy group of the silane coupling agent reacts with the polar groups (such as the carboxyl group of graphene oxide) in the rubber;

[0123] 2. Physical anchoring: the porous structure of the carbon nanotube layer provides anchoring points for the rubber;

[0124] 3. Vulcanization synergy: the sulfur vulcanization system promotes the formation of thiolate (—S—metal) bonds at the rubber-metal interface.

[0125] The following will be introduced in conjunction with specific examples:

[0126] Example 1:

[0127] The raw material formula is prepared according to the following mass components: 100 parts of rubber matrix, 57 parts of halogen-free flame retardant system, 2 parts of graphene oxide and polyaniline composite antistatic agent, wherein the mass ratio of graphene oxide to polyaniline is 1:0.8, 2.2 parts of anti-aging agent, 1.2 parts of processing aid, 2.3 parts of vulcanizing agent;

[0128] Among them, the polyaniline in the composite antistatic agent is in-situ coated on the surface of the graphene oxide sheet layer;

[0129] The halogen-free flame retardant system is composed of magnesium hydroxide, encapsulated ammonium polyphosphate and zinc borate, the anti-aging agent is a mixture of hindered phenolic antioxidant, microcrystalline wax and benzotriazole ultraviolet absorber, the processing aid is a mixture of ionic liquid and polyethylene glycol, and the vulcanizing agent is composed of sulfur and accelerator.

[0130] During preparation, graphene oxide is first dispersed by ultrasonic in water, then silane coupling agent KH-550 is added and stirred, followed by mixing with aniline monomer, adding ammonium persulfate aqueous solution dropwise, reacting at room temperature for 6 hours, filtering and washing to neutral, and vacuum drying at 60°C to crush to a particle size of ≤50μm to obtain graphene oxide and polyaniline composite powder;

[0131] Two-stage rubber mixing was adopted. In the first stage, rubber matrix, halogen-free flame retardant system, vulcanizing agent and anti-aging agent were added into the internal mixer, and mixing was carried out at 75°C and 40 rpm for 4 minutes. In the second stage, the temperature of the internal mixer was reduced to 55°C, and the composite powder and processing aid were added, and mixing was carried out for 7 minutes to obtain the rubber compound.

[0132] Subsequently, the connecting ring 4, the conductive fiber web 5, the conductive ring 6 and the connecting column 7 were placed into the suction cup mold, and the rubber compound preheated to 80°C was injected. The initial vulcanization was carried out at 160°C with a pressure of 5 MPa for 2 minutes, and then the pressure was increased to 15 MPa for 6 minutes. After the initial vulcanization, the mold was removed, and the product was obtained by immersing it in an ice water bath at 0°C for 10 seconds and then performing secondary vulcanization in an oven at 115°C for 1.5 hours.

[0133] The conductive fiber web 5, the conductive ring 6 and the connecting column 7 were treated according to the corresponding treatment method, which will not be described here.

[0134] As can be seen from Table 1, by adjusting the raw materials, introducing new composite antistatic agents, and combining structure design and process, the basic performance of the rubber suction cup is significantly improved.

[0135] Example Two:

[0136] In the raw material formula, the mass components of the suction cup 1 and the connecting column 2 are: rubber matrix 100 parts, halogen-free flame retardant system 60 parts, graphene oxide and polyaniline composite antistatic agent 5 parts, mass ratio of graphene oxide to polyaniline 1:1.2, anti-aging agent 3.7 parts, processing aid 2.1 parts, vulcanizing agent 3.4 parts.

[0137] In the composite antistatic agent, polyaniline is in-situ coated on the surface of the graphene oxide sheet.

[0138] In the preparation process, when preparing the graphene oxide and polyaniline composite powder, the reaction time at room temperature is adjusted to 7 hours. In the first stage of two-stage rubber mixing, mixing is carried out at 80°C and 50 rpm for 5 minutes.

[0139] In the second stage, the temperature of the internal mixer is reduced to 60°C, and mixing is carried out for 8 minutes. In the stepwise pressure vulcanization, the suction cup mold is preheated to 90°C, and the initial vulcanization is carried out at 165°C with a pressure of 6 MPa for 2 minutes, and then the pressure is increased to 17 MPa for 8 minutes.

[0140] After demolding, immerse in a 3°C ice water bath for 13 seconds, and then perform secondary vulcanization in an oven at 120°C for 2 hours.

[0141] Among them, the processing technology of the conductive fiber web 5 and the conductive ring 6, and the connecting column 7 is consistent with that of Example One.

[0142] As can be seen from Table 2, by focusing on the precise optimization of raw material ratio and the fine improvement of preparation process, the overall performance of flame retardation, anti-static and other properties is improved.

[0143] Example Three:

[0144] The raw material formula uses: rubber matrix 100 parts, halogen-free flame retardant system 62 parts, graphene oxide and polyaniline composite antistatic agent 7 parts, mass ratio of graphene oxide and polyaniline 1:1.5, anti-aging agent 5.2 parts, processing aid 3.0 parts, vulcanizing agent 4.5 parts;

[0145] The polyaniline in the composite antistatic agent is in-situ coated on the surface of the graphene oxide sheet.

[0146] In the preparation method, the graphene oxide and polyaniline composite powder is prepared at room temperature for 8 hours, and the two-stage rubber mixing is mixed at 85°C and 60rpm for 6 minutes in the first stage; the temperature of the internal mixer is reduced to 65°C in the second stage, and mixing for 10 minutes;

[0147] When stepwise pressurization vulcanization is performed, the suction cup mold is preheated to 100°C, and at 170°C, first vulcanized at a pressure of 8MPa for 2 minutes, and then vulcanized at a pressure of 20MPa for 10 minutes. After demolding, immerse in a 5°C ice water bath for 15 seconds, and perform 2.5 hours of secondary vulcanization in a 125°C oven.

[0148] The silver plating treatment of the conductive fiber net 5 and the treatment process of the conductive ring 6 and the connecting column 7 are the same as in Example One, which ensures good conductive and anti-static performance.

[0149] As can be seen from Table 3, with the deep synergy of raw materials and the advanced preparation process, a high-performance, multi-functional rubber suction cup technology benchmark is created.

[0150] Table 1: Performance breakthroughs under the optimization of basic formula and structural innovation

[0151] Comparison project Prior art Example one Effect comparison Raw material formula Single ratio, no composite functional system Raw material containing multiple functional systems such as flame retardation, static prevention, etc. Integration of multiple functions, better performance Antistatic performance No composite antistatic agent, poor effect Overall surface resistance of rubber suction cup 6.7 x 10 8 Ω]]> Significant improvement in static elimination ability Preparation process No segmented processing and component modification Two-stage mixing and special processing of components Uniform mixing, strong component combination Flame retardation performance Flammable Oxygen index 32%, UL94 V-0 level Significant improvement in flame retardation effect

[0152] Table 2: Formula refinement and process upgrading

[0153] Comparison project Prior art Example two Effect comparison Raw material formula No scientific ratio Optimized ratio, balanced performance Significant improvement in comprehensive performance Antistatic performance High surface resistance Overall surface resistance of rubber suction cup 3.1 x 10 7 Ω Better antistatic effect Preparation process Rudimentary process Fine processing Improved molding quality and bonding strength Flame retardation performance Poor flame retardation effect Oxygen index 34%, fast self-extinguishing Excellent flame retardation performance

[0154] Table 3: Extreme synergy of raw materials and advanced process integration

[0155] Comparison project Prior art Example three Effect comparison Raw material formula Cannot realize multiple functions Maximize the effect of raw materials Optimal performance Antistatic performance Weak antistatic ability Overall surface resistance of rubber suction cup 5.8 x 10 6 Ω]]> Meet high protection requirements Preparation process Untreated conductive components Advanced process and component modification Good yield rate of 92% Flame retardation performance Safety hazard No melt dripping at high temperature Excellent flame retardation effect

[0156] Table 4: Key performance synergy optimization table

[0157] Performance indicators Example 1 (low ratio) Example 2 (median ratio) Example 3 (high ratio) Test standard Oxygen index 30% 34% 35% ASTM D2863 Surface resistance 6.7 x 10 8 Ω]] 3.1 x 10 7 Ω]] 5.8 x 10 6 Ω]] GB / T 1410 Peel strength 2.8 kN / m 3.5 kN / m 3.2 kN / m ASTM D429 Resistance change after aging +15% +5% +8% 85℃ / 85% RH, 1000h

[0158] As can be seen from the test results in Table 4, the flame-retardant and anti-static rubber suction cup in the above three examples meets the performance requirements in terms of surface resistance change rate, resistance range and conductive structure integrity, and verifies the long-term stability of the anti-static performance.

[0159] Specifically, the effective comparative test with the performance test is as follows:

[0160] 1. Anti-static performance comparison experiment.

[0161] Test sample:

[0162] The application: containing 5 parts of graphene oxide / polyaniline composite antistatic agent (mass ratio 1:1.2), taking example two as an example;

[0163] Comparative example: the difference from example two is that the composite antistatic agent is not used, and it contains 5 parts of traditional carbon black antistatic agent (N330 carbon black).

[0164] Test method and result:

[0165] Test item The present application (GO / PANI) Comparative example (carbon black) Test standard Initial surface resistance (Ω) 3.1 x 10 7 ]]> 1.2 x 10 10 ]]> GB / T 1410 Resistance after 10,000 cycles 3.3 x 10 7 (+6.7%)]]> 1.5 x 10 10 (+50%)]]> Mechanical stress simulation test* Resistance after high temperature and high humidity aging 3.2 x 10 7 (+3.3%)]]> 2.4 x 10 10 (+100%)]]> 85℃ / 85% RH, 1000h Migration (SEM observation) No filler aggregation Carbon black particle migration JISK6251

[0166] Conclusion:

[0167] The resistance stability of the composite antistatic agent of the application is significantly better than that of carbon black (change rate after cycling <7% vs. 50%);

[0168] Carbon black doubles the resistance after aging due to migration, while GO / PANI composite remains stable dispersion.

[0169] 2. Flame retardant performance comparison experiment.

[0170] Test sample:

[0171] The application: halogen-free flame retardant system 60 (magnesium hydroxide 30+ammonium polyphosphate 22+zinc borate 8), taking example two as an example;

[0172] Comparative example: the difference from example two is that the above halogen-free flame retardant system is replaced by traditional flame retardant system 60 (decabromodiphenyl ether+antimony trioxide).

[0173] Test result:

[0174] Test item The present application Comparative example Test standard Oxygen index (OI) 34% 28% ASTM D2863 UL94 rating V-0 V-1 UL 94 Combustion dripping No dripping Dripping / Smoke density (Ds) 45 120 ASTM E662

[0175] Conclusion:

[0176] The halogen-free system of the application has higher flame retardant efficiency (OI increases by 6%), and has no melt drop and low smoke;

[0177] Traditional bromine-based flame retardant has high smoke toxicity (Ds>100), which does not meet the environmental safety requirements.

[0178] 3. Mechanical performance and durability comparison.

[0179] Test sample:

[0180] The application: taking example two as an example;

[0181] Comparative Example: The difference from Example 2 is that the above halogen-free flame-retardant system is replaced by a bromine-based flame retardant, and the composite antistatic agent is replaced by traditional carbon black.

[0182] Test item The present application Comparative example (carbon black + bromine-based flame retardant) Test standard Tensile strength (MPa) 11.8 9.5 ASTM D412 Tear strength (kN / m) 33.2 25.3 ASTM D624 Delamination after cold and hot cycling No Interface cracking -40℃~125℃, 50 times

[0183] Conclusion:

[0184] The present application has less mechanical performance loss due to interfacial silane modification and uniform dispersion of fillers;

[0185] The conventional formula has obvious durability degradation due to carbon black agglomeration and poor compatibility of bromine-based flame retardant.

[0186] Based on the above three performance comparisons, the technical advantages are summarized as follows:

[0187] Performance dimension The present application Traditional technology Antistatic property Resistance stabilization (variation < 7%) Resistance attenuation is fast (+50%) Flame retardation property UL94 V-0, halogen-free and low smoke UL94 V-1, containing bromine and high toxicity Interface bonding force Peel strength 3.5 kN / m, no delamination ≤1.5 kN / m, easy to crack

[0188] In summary, the flame-retardant and anti-static rubber suction cup of the present application meets the performance requirements in terms of surface resistance change rate, resistance range and conductive structure integrity, and verifies the long-term stability of the anti-static performance.

[0189] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A flame-retardant and anti-static rubber suction cup, comprising a suction cup (1), characterized in that: The suction cup (1) is fixedly connected to a connecting column (2) at the top. The suction cup (1) is fixedly connected to a faceplate end (3) at the outer edge of the side. A conductive ring (6) is provided inside the wall thickness of the connecting column (2). A conductive fiber mesh (5) is fixedly connected to the bottom edge of the conductive ring (6). The conductive fiber mesh (5) is located inside the wall thickness of the suction cup (1). A connecting column (7) is fixedly connected to the top of the conductive ring (6). A connecting ring (4) is fixedly connected to the top of the connecting column (7).

2. The flame-retardant and anti-static rubber suction cup according to claim 1, characterized in that: The suction cup (1) and the connecting column (2) are integrally formed by vulcanization, and the suction cup (1) and the connecting column (2) are composed of the following mass components: 100 parts of rubber matrix, 57–62 parts of halogen-free flame retardant system, 2–7 parts of graphene oxide and polyaniline composite antistatic agent, wherein the mass ratio of graphene oxide to polyaniline is 1:(0.8–1.5), 2.2–5.2 parts of anti-aging agent, 1.2–3.0 parts of processing aid, and 2.3–4.5 parts of vulcanizing agent; In the composite antistatic agent, polyaniline is in situ coated on the surface of graphene oxide sheets.

3. The flame-retardant and anti-static rubber suction cup according to claim 2, characterized in that: The raw materials of the halogen-free flame retardant system are a mixture of magnesium hydroxide, encapsulated ammonium polyphosphate and zinc borate; the anti-aging agent is a mixture of hindered phenolic antioxidants, microcrystalline wax and benzotriazole ultraviolet absorbers; the processing aid is a mixture of ionic liquid and polyethylene glycol; and the vulcanizing agent is a mixture of sulfur and accelerator.

4. A method for preparing a flame-retardant and antistatic rubber suction cup, characterized in that, The preparation method of the flame-retardant and antistatic rubber suction cup according to any one of claims 1-3 includes the following steps: S1. Graphene oxide is added to water and ultrasonically dispersed to form a uniform suspension. Then, silane coupling agent KH-550 is added to the suspension and stirred. Aniline monomer is then added and mixed to form a preliminary mixture. Ammonium persulfate aqueous solution is added dropwise to the preliminary mixture and reacted at room temperature for 6-8 hours. After filtration, the mixture is repeatedly washed until the filtrate is neutral. Finally, it is vacuum dried at 60°C and pulverized to a particle size ≤50μm to obtain graphene oxide and polyaniline composite powder. S2. Further adopt a two-stage rubber compounding process. In the first stage, the rubber matrix, halogen-free flame retardant system, vulcanizing agent and anti-aging agent are added to the internal mixer and mixed at 75-85℃ and 40-60rpm for 4-6 minutes. In the second stage, after the temperature in the internal mixer drops to 55-65℃, the graphene oxide and polyaniline composite powder and processing aids obtained in S1 are added and mixed for 7-10 minutes to obtain the compound rubber. S3. First, place the connecting ring (4), conductive fiber mesh (5), conductive ring (6) and connecting post (7) in the suction cup mold. Then, inject the compound into the suction cup mold preheated to 80-100℃, so that the compound covers the conductive fiber mesh (5) and conductive ring (6) as a whole, and covers part of the connecting post (7). At 160-170℃, first vulcanize at 5-8MPa pressure for 2 minutes, and then increase to 15-20MPa pressure for 6-10 minutes. S4. After the initial vulcanization time is reached, demold the suction cup. After demolding, immerse it in a 0-5℃ ice water bath for 10-15 seconds to cool it down quickly, and then carry out a second-stage vulcanization in an oven at 115-125℃ for 1.5-2.5 hours.

5. The method for preparing a flame-retardant and antistatic rubber suction cup according to claim 4, characterized in that: The preparation method of the halogen-free flame retardant system in S2 includes the following steps: S2011. Melamine and formaldehyde solution are mixed and reacted at 60-65℃. The pH is adjusted to 8.5-9.0 to generate a transparent prepolymer. Then, ammonium polyphosphate is dispersed in water to form a slurry. The temperature is raised to 70℃, and the prepolymer is added dropwise to the slurry. The temperature is raised to 85℃ at 0.5℃ / min and the reaction is maintained for 2 hours. The reaction solution is cooled to room temperature, filtered, washed with water until neutral, and dried at 80℃ to obtain encapsulated ammonium polyphosphate. S2012. Add magnesium hydroxide powder to a high-speed mixer, preheat to 80°C for 10 minutes, spray atomized stearic acid ethanol solution, process at 1200 rpm for 15 minutes, and after discharge, pass through a 200-mesh sieve to obtain hydrophobic magnesium hydroxide. S2013. Encapsulated ammonium polyphosphate, modified magnesium hydroxide and zinc borate are added to a three-dimensional mixer, and inert gas is injected into the three-dimensional mixer. The three preparations are dry-mixed at 30 rpm for 20 minutes under the protection of inert gas to obtain a uniform composite flame retardant powder.

6. The method for preparing a flame-retardant and antistatic rubber suction cup according to claim 4, characterized in that: In step S2, the method for preparing the anti-aging agent includes the following steps: S2021. Add the hindered phenolic antioxidant and benzotriazole UV absorber to acetone, stir and dissolve at 60°C, add microcrystalline wax fragments, and continue stirring until completely transparent. S2022. Pour the mixed solution into -10℃ ethanol, emulsify by high-speed shearing at 5000rpm, filter and collect the precipitate, vacuum dry at 40℃ for 12 hours, melt extrude through a twin-screw extruder at 70℃, and granulate underwater to obtain masterbatch with a diameter of 1-2mm.

7. The method for preparing a flame-retardant and antistatic rubber suction cup according to claim 4, characterized in that: In step S2, the preparation method of the processing aid includes the following steps: S2031. The ionic liquid was passed through an alumina chromatography column to remove free halide ions, and then vacuum dehydrated at 80°C for 4 hours. The water content was measured to be ≤50ppm. S2032: Nitrogen gas is bubbled through polyethylene glycol for 30 minutes to remove dissolved oxygen, and then molecular sieves are added for sealed storage for later use. S2033. Add the purified ionic liquid and deoxygenated polyethylene glycol into a mixing tank at a volume ratio, and sonicate for 5 minutes to obtain a homogeneous transparent liquid.

8. The method for preparing a flame-retardant and antistatic rubber suction cup according to claim 4, characterized in that: In step S2, the preparation method of the vulcanizing agent includes the following steps: S2041. Sublimed sulfur is processed by an air jet mill and 1-5μm ultrafine sulfur powder is collected in stages. S2042. Add the accelerator and zinc stearate into a high-speed mixer, treat at 110°C and 2000 rpm for 10 minutes, and cool to obtain the coated accelerator. S2043: Add micronized sulfur, coating accelerator, and zinc oxide to a mixer, mix at 60°C for 3 minutes, and then press and crush into 1mm particles of vulcanizing agent.

9. The method for preparing a flame-retardant and antistatic rubber suction cup according to claim 4, characterized in that: The conductive fiber mesh (5) is made of silver-plated polyester fiber, and a silver layer with a thickness of 0.5-1μm is uniformly plated on the surface of the polyester fiber by chemical silver plating process. The chemical silver plating process involves first immersing the polyester fiber in a sodium hydroxide solution for 10 minutes to roughen the surface, then rinsing it with water and immersing it in a plating solution made of silver nitrate solution and glucose solution in a volume ratio of 1:

2. The mixture is then reacted at room temperature for 30 minutes, rinsed with water, and dried.

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