Toughness-enhanced multifunctional filling master batch and production process thereof

Abstract

The invention discloses a toughness-enhanced multifunctional filling master batch and a production process thereof, and relates to the technical field of filling master batch production, the raw materials comprise the following components by mass: 10-30 parts of carrier resin, 1-10 parts of a flexibilizer, 2-8 parts of a plasticizer, 0.1-5 parts of a dispersant, 0.5-3 parts of an antioxidant, 60-80 parts of a filler, 0.1-2 parts of a light stabilizer, and 1-7 parts of a lubricant. According to the invention, the PPVC and the PP are mixed in proportion to prepare the carrier resin, the carrier resin is used as a matrix for preparing the multifunctional filling master batch, and the dispersing agent and the carrier resin are premixed firstly, so that the dispersing agent can play a better role in the whole system; the antistatic agent is subjected to microencapsulation treatment, and the surface of the antistatic agent is coated with a layer of protective film, so that the validity period of the antistatic function is prolonged, the antistatic agent continuously plays a role, and the preparation efficiency and the performance durability of the multifunctional filling master batch are improved to a certain extent.

Description

Technical Field

[0001] The invention relates to the technical field of filling masterbatch production, in particular to a toughness-enhanced multifunctional filling masterbatch and a production process thereof. Background Art

[0002] Filler masterbatch is a granular material obtained by mixing various required additives, fillers and a small amount of carrier resin during the plastic processing and molding process. It is widely used in the fields of plastic products, automotive industry, medical equipment, building materials, etc. The flame retardancy and antistatic properties of existing filling masterbatches will be affected in long-term use, and it is difficult to maintain good performance continuously.

[0003] The defects of existing filling masterbatch are: 1. Patent document CN109135008B discloses a filling masterbatch, its preparation method, use and polypropylene drawing material containing the same. It mainly considers how to improve the mechanical properties of polypropylene drawing material while improving the smoke problem in the polypropylene drawing production process, but does not consider how to improve the flame retardancy and antistatic performance of the filling masterbatch. 2. Patent document CN103709574B discloses a reinforcing and toughening filler masterbatch with compatibilizing properties and a preparation method thereof. The patent mainly considers how to make the filler masterbatch have excellent compatibilizing properties in addition to having good reinforcing and toughening properties, but does not consider how to improve the mechanical properties of the filler masterbatch by strictly controlling the purity of the filler in the raw materials; 3. Patent document CN106832568B discloses a reinforced plastic filled lubricating masterbatch and a preparation method thereof. It mainly considers how to solve the defect problem that lubrication and reinforcement cannot be taken into account at the same time in the processing of plastic products, but does not consider how to make the materials more closely mixed and improve the dispersion of the filler, thereby improving the overall performance of the filled masterbatch; 4. Patent document CN114672125B discloses a filling masterbatch and its preparation method and application. It mainly considers how to make the polypropylene composite material have good polarity and good mechanical properties, but does not consider how to improve the problems of delamination and cracking of the filling masterbatch during long-term use. Summary of the invention

[0004] The purpose of the present invention is to provide a toughness-enhanced multifunctional filler masterbatch and a production process thereof to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a toughness-enhanced multifunctional filler masterbatch, wherein the raw materials thereof include the following components in parts by mass: 10 to 30 parts of carrier resin, 1 to 10 parts of toughening agent, 2 to 8 parts of plasticizer, 0.1 to 5 parts of dispersant, 0.5 to 3 parts of antioxidant, 60 to 80 parts of filler, 0.1 to 2 parts of light stabilizer, 1 to 7 parts of lubricant, 0.2 to 6 parts of compound flame retardant and 0.1 to 5 parts of microcapsule antistatic agent; The multifunctional filling masterbatch is prepared by mixing a carrier resin, a toughening agent, a plasticizer, a dispersant, an antioxidant, a filler, a light stabilizer, a lubricant, a compound flame retardant and a microcapsule antistatic agent.

[0006] Preferably, the composite flame retardant is prepared by mixing decabromodiphenyl ether and magnesium hydroxide in a mass ratio of (1-5):1, and the carrier resin is prepared by mixing PPVC and PP in a mass ratio of (1-3):1.

[0007] Preferably, the filler is a mixture of calcium carbonate, mica and carbon black in a mass ratio of (1-3): (0.5-2): 1, and the particle size of the filler is 5-10 μm.

[0008] Preferably, the antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 264, antioxidant 168 and TPP, and the dispersant is one or more of stearic acid, aluminate coupling agent, titanate coupling agent and EBS.

[0009] Preferably, the production process of the toughness-enhanced multifunctional filler masterbatch is as follows: Step S1: pretreatment: pretreatment of PPVC, PP, calcium carbonate, mica and carbon black, and mixing the pretreated PPVC and PP to prepare a carrier resin, and mixing calcium carbonate, mica and carbon black to prepare a filler; Step S2: Preparation of auxiliary agents: preparing a compound flame retardant and a microencapsulated antistatic agent; Step S3: Mixing and kneading: firstly, the carrier resin, toughening agent, plasticizer, dispersant, antioxidant, filler, light stabilizer, lubricant, compound flame retardant and microcapsule antistatic agent are placed in a high-speed mixer in order and proportion for preliminary mixing to form a premix, and then the premix is ​​transferred to an internal mixer for further kneading; Step S4: extrusion granulation: the mixed material is extruded and granulated through a twin-screw extruder to form a multifunctional filling masterbatch; Step S5: Performance test: Performing a performance test on the multifunctional filling masterbatch obtained in step S4; Step S6: Packaging and storage: The prepared filling masterbatch is put into a plastic film bag, the air in the bag is emptied, the packaging opening is sealed, and identification information is affixed, and then it is stored in a dry, ventilated, and light-proof place.

[0010] Preferably, the step S1 further includes the following steps: Step S11: pretreatment of carrier resin: PPVC and PP are placed in a hot air circulation oven for drying treatment, wherein PPVC is dried at 70-90°C for 10-20 min, and PP is dried at 90-100°C for 10-20 min, then the dried PPVC and PP are placed in a high-speed mixer, and lubricant is added thereto to uniformly mix the two resins, wherein the mass ratio of PPVC, PP and lubricant is (1-3):1:(0.2-0.3), the speed of the high-speed mixer is 800-900 rpm, the mixing temperature is room temperature, and the mixing time is 5-15 min, then the mixed resin is placed in a twin-screw extruder for heating treatment to obtain a carrier resin, wherein the heating temperature is 170-180°C, the heating time is 5-15 min, and the screw speed is 200-400 rpm; Step S12: filler pretreatment: first, the purity and particle size of calcium carbonate, mica and carbon black are tested, and the substances with unqualified purity and particle size are screened out. The calcium carbonate, mica and carbon black are dried in a hot air circulation oven respectively, and then the particle sizes of calcium carbonate, mica and carbon black are screened with a sieve, and the particles with larger particle sizes are placed in a ball mill for grinding, and then screened again. After the screening is completed, the screened calcium carbonate, mica and carbon black are respectively immersed in a silane coupling agent for surface modification. After soaking for 1 to 2 hours, they are dried at 80°C for 30 to 40 minutes. Then, the surface-modified calcium carbonate, mica and carbon black are mixed in a mass ratio of (1 to 3): (0.5 to 2): 1, wherein the calcium carbonate is dried at a temperature of 110°C for 2 hours, the mica is dried at 90°C for 4 hours, and the carbon black is dried at 100°C for 3 hours. The stirring speed during the mixing process is 80 to 120 rpm, and the stirring time is 30 to 45 minutes.

[0011] Preferably, the step S2 further includes the following steps: Step S21: compounding flame retardant: firstly, decabromodiphenyl ether is placed in a vacuum drying oven at 60°C for 2 hours, then magnesium hydroxide is placed in a vacuum drying oven at 100°C for 3 hours, and then magnesium hydroxide and stearic acid are placed in a high-speed mixer for mixing to prepare a compound flame retardant, wherein the mixing temperature is 80°C, the mixing time is 1 to 1.5 hours, the speed of the high-speed mixer is 700 to 800 rpm, and the mass ratio of magnesium hydroxide to stearic acid is 1:(1 to 3); Step S22: Microencapsulation of antistatic agent: Sodium alginate is dissolved in water to form a wall material solution, and then the antistatic agent is dissolved in water to form a uniform antistatic agent solution. The antistatic agent solution and the wall material solution are then mixed and emulsified by ultrasonic emulsification to form a stable emulsion, wherein the stirring speed is 70-80 rpm, the stirring time is 30 min, and the volume ratio of the wall material solution to the antistatic agent solution is (1-3):1. Subsequently, microencapsulation is performed by complex coacervation, and then cured at 60-70°C to form a stable microcapsule structure, wherein the heating time is 30 min. Subsequently, the microcapsules are separated from the reaction system, washed with clean water, and dried at 40-80°C for 20-40 min to obtain a microencapsulated antistatic agent.

[0012] Preferably, the step S3 further includes the following steps: Step S31: firstly add the carrier resin and the dispersant into a high-speed mixer for premixing, the speed of the high-speed mixer is 800-900 rpm, the mixing temperature is 40-60° C., and the mixing time is 20-40 min, then add the toughening agent, plasticizer, antioxidant, filler and lubricant into the high-speed mixer in sequence, continue to mix at a speed of 800-900 rpm for 30 min at a temperature of 40-60° C., then add the light stabilizer, the compound flame retardant and the microcapsule antistatic agent into the high-speed mixer, mix at a speed of 900 rpm for 20-45 min at a temperature of 50-70° C., and form a uniform premix; Step S32: Then, the premix formed in step S31 is transferred to an internal mixer for further mixing, wherein the speed of the internal mixer is 80-90 rpm, the internal mixing temperature is 160-190° C., and the mixing time is 10-20 min.

[0013] Preferably, the step S4 further includes the following steps: Step S41: Extrusion: using a twin-screw extruder to extrude the material mixed in step S3, wherein the temperature of the feed section is 150-160°C, the temperature of the compression section is 180°C, the temperature of the metering section and the die head is 200°C, and the screw speed is 60-80rpm; Step S42: Refining: The extruded material is then refined by an open mill, wherein the roller temperature is 50-55° C. and the roller speed ratio is 1.1, to obtain a uniform multifunctional filling masterbatch.

[0014] Preferably, the step S5 further includes the following steps: Step S51: testing the mechanical properties of the prepared multifunctional filling masterbatch according to the QB / T1126-2021 polyolefin filling masterbatch standard; Step S52: performing flame retardancy test and antistatic performance test on the masterbatch that has not been subjected to mechanical property test and the masterbatch that has been subjected to mechanical property test, respectively, to obtain flame retardancy grade and antistatic performance evaluation.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, PPVC and PP are mixed in proportion to prepare a carrier resin, and the carrier resin is used as a matrix for preparing a multifunctional filling masterbatch. The dispersant and the carrier resin are premixed first, and then mixed with other raw materials in a certain order and proportion. This helps the dispersant to play a better role in the entire system, and the flame retardant is compounded to improve the durability of the flame retardant performance of the filling masterbatch and enhance the stability of the flame retardant effect. The antistatic agent is microencapsulated and a protective film is wrapped on the surface of the antistatic agent to extend the effective period of the antistatic function, so that the antistatic agent can continue to play a role, thereby improving the preparation efficiency and performance durability of the multifunctional filling masterbatch to a certain extent.

[0016] 2. The present invention strictly controls the quality of the filler and tests the purity and particle size of the filler. High-purity fillers are helpful to provide better filling effects in the subsequent process and reduce the influence of impurities on the performance of the multifunctional filler masterbatch prepared subsequently. Fillers with smaller particle sizes and uniform distribution can improve the smoothness and mechanical properties of the multifunctional filler masterbatch to a certain extent.

[0017] 3. The present invention combines a high-speed mixer and an internal mixer, first performs preliminary mixing in the high-speed mixer, quickly stirs the raw materials evenly, and then transfers the premix to the internal mixer for further mixing, so that the materials can be mixed more closely together, effectively improving the dispersibility of the filler, and thus improving the overall performance of the prepared multifunctional filling masterbatch.

[0018] 4. The present invention pre-treats the filler by first drying the filler to effectively remove moisture from the filler, thereby avoiding problems such as bubbles in subsequent processing. Surface modification is then performed to improve the compatibility of the filler with the resin, thereby enhancing the bonding force between the filler and the resin to a certain extent, improving the dispersibility of the filler in the resin, and thereby improving problems such as stratification and cracking of the filling masterbatch during long-term use. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The present invention provides a toughness-enhanced multifunctional filling masterbatch and a production process thereof. The production process of the toughness-enhanced multifunctional filling masterbatch is as follows: Step S1: PPVC and PP are placed in a hot air circulation oven for drying, wherein PPVC is dried at 80°C for 15 minutes, and PP is dried at 90°C for 15 minutes. The dried PPVC and PP are then placed in a high-speed mixer, and lubricant is added thereto to uniformly mix the two resins, wherein the mass ratio of PPVC, PP and lubricant is 2:1:0.2, the speed of the high-speed mixer is 850 rpm, the mixing temperature is room temperature, and the mixing time is 15 minutes. The mixed resin is then placed in a twin-screw extruder for heating to obtain a carrier resin, wherein the heating temperature is 170°C, the heating time is 15 minutes, and the screw speed is 300 rpm. The purity and particle size of calcium carbonate, mica and carbon black are then tested to screen out For materials with unqualified purity and particle size, use a hot air circulation oven to dry calcium carbonate, mica and carbon black respectively, then use a sieve to screen the particle size of calcium carbonate, mica and carbon black, and put the particles with larger particle size into a ball mill for grinding, and then screen again. After the screening is completed, the screened calcium carbonate, mica and carbon black are respectively immersed in a silane coupling agent for surface modification. After soaking for 1 hour, they are dried at 80°C for 30 minutes. Then, the surface-modified calcium carbonate, mica and carbon black are mixed in a mass ratio of 2:1:1, wherein calcium carbonate is dried at a temperature of 110°C for 2 hours, mica is dried at 90°C for 4 hours, and carbon black is dried at 100°C for 3 hours. The stirring speed during the mixing process is 100rpm and the stirring time is 40 minutes. Step S2: firstly, decabromodiphenyl ether is placed in a vacuum drying oven at 60°C for 2h, then magnesium hydroxide is placed in a vacuum drying oven at 100°C for 3h, and then magnesium hydroxide and stearic acid are placed in a high-speed mixer for mixing to prepare a composite flame retardant, wherein the mixing temperature is 80°C, the mixing time is 1h, the speed of the high-speed mixer is 700rpm, the mass ratio of magnesium hydroxide to stearic acid is 1:2, sodium alginate is dissolved in water to form a wall material solution, and then an antistatic agent is dissolved in water to form a uniform antistatic agent solution, and then the antistatic agent solution and the wall material solution are mixed. The wall material solution is mixed and emulsified by ultrasonic emulsification to form a stable emulsion, wherein the stirring speed is 70 rpm, the stirring time is 30 minutes, the volume ratio of the wall material solution to the antistatic agent solution is 2:1, and then microencapsulation is carried out by complex coacervation, and then solidified at 60°C to form a stable microcapsule structure, wherein the heating time is 30 minutes, and then the microcapsules are separated from the reaction system, washed with clean water, and dried at 60°C for 30 minutes to obtain a microencapsulated antistatic agent, wherein the mass ratio of decabromodiphenyl ether to magnesium hydroxide is 3:1; Step S3: First, the carrier resin and the dispersant are added to the high-speed mixer for premixing, the speed of the high-speed mixer is 800 rpm, the mixing temperature is 50° C., and the mixing time is 30 min. Then, the toughening agent, plasticizer, antioxidant, filler and lubricant are added to the high-speed mixer in sequence, and the mixing is continued at 50° C. and 800 rpm for 30 min. Then, the light stabilizer, the compound flame retardant and the microcapsule antistatic agent are added to the high-speed mixer, and the mixing is continued at 60° C. and 900 rpm for 40 min. min to form a uniform premix, and then transfer the formed premix to an internal mixer for further mixing, wherein the speed of the internal mixer is 90 rpm, the internal mixing temperature is 170 ° C, and the time is 15 min, wherein the mass ratio of carrier resin, toughening agent, plasticizer, dispersant, antioxidant, filler, light stabilizer, lubricant, compound flame retardant and microcapsule antistatic agent is (10-30): 3: 4: (0.1-5): 1: (60-80): 0.5: 3: (0.2-6): (0.1-5); Step S4: using a twin-screw extruder to extrude the material mixed in step S3, wherein the temperature of the feeding section is 150° C., the temperature of the compression section is 180° C., the temperature of the metering section and the die head is 200° C., and the screw speed is 60 rpm, and then the extruded material is refined by an open mill, wherein the roller temperature is 50° C., and the roller speed ratio is 1.1, to obtain a uniform multifunctional filling masterbatch; Step S5: According to the QB / T1126-2021 polyolefin filler masterbatch standard, the mechanical properties of the prepared multifunctional filler masterbatch are tested, and the masterbatch that has not been tested for mechanical properties and the masterbatch that has been tested for mechanical properties are tested for flame retardancy and antistatic properties, respectively, to obtain a flame retardant grade and an antistatic performance evaluation; Step S6: Put the prepared filling masterbatch into a plastic film bag, exhaust the air in the bag, seal the package opening, affix identification information, and then store it in a dry, ventilated, and light-proof place.

[0021] Further, the value of step S3 is changed, and steps S1-S2 and S4-S6 are performed to test the mechanical properties, flame retardant properties and antistatic properties of the prepared multifunctional filling masterbatch.

[0022] Embodiment 1: Step S3: first, add the carrier resin and the dispersant into a high-speed mixer for premixing, the speed of the high-speed mixer is 800 rpm, the mixing temperature is 50° C., and the mixing time is 30 min. Then, the toughener, plasticizer, antioxidant, filler and lubricant are added into the high-speed mixer in sequence, and the mixture is mixed at 800 rpm for 30 min at 50° C. Then, the light stabilizer, the compound flame retardant and the microcapsule antistatic agent are added into the high-speed mixer, and the mixture is mixed at 900 rpm for 40 min at 60° C. to form a uniform premix. Then, the formed premix is ​​transferred into an internal mixer for further mixing, wherein the speed of the internal mixer is 90 rpm, the mixing temperature is 170° C., and the mixing time is 15 min. The mass ratio of the carrier resin, the toughener, the plasticizer, the dispersant, the antioxidant, the filler, the light stabilizer, the lubricant, the compound flame retardant and the microcapsule antistatic agent is 10:3:4:0.6:1:70:0.5:3:1:0.5.

[0023] Furthermore, the tensile strength is 24 MPa, the elongation at break is 19%, the flame retardant grade of the masterbatch without mechanical property test is V0, the antistatic performance evaluation of the masterbatch without mechanical property test is: good, the flame retardant grade of the masterbatch with mechanical property test is V1, and the antistatic performance evaluation of the masterbatch with mechanical property test is: good.

[0024] Embodiment 2: Step S3: first add the carrier resin and the dispersant into a high-speed mixer for premixing, the speed of the high-speed mixer is 800 rpm, the mixing temperature is 50°C, and the mixing time is 30 min. Then, the toughener, plasticizer, antioxidant, filler and lubricant are added into the high-speed mixer in sequence, and the mixture is mixed at 800 rpm for 30 min at 50°C. Then, the light stabilizer, the compound flame retardant and the microcapsule antistatic agent are added into the high-speed mixer, and the mixture is mixed at 900 rpm for 40 min at 60°C to form a uniform premix. Then, the formed premix is ​​transferred into an internal mixer for further mixing, wherein the speed of the internal mixer is 90 rpm, the mixing temperature is 170°C, and the mixing time is 15 min. The mass ratio of the carrier resin, the toughener, the plasticizer, the dispersant, the antioxidant, the filler, the light stabilizer, the lubricant, the compound flame retardant and the microcapsule antistatic agent is 10:3:4:0.6:1:65:0.5:3:1:0.5.

[0025] Furthermore, the tensile strength is 24 MPa, the elongation at break is 19%, the flame retardant grade of the masterbatch without mechanical property test is V0, the antistatic performance evaluation of the masterbatch without mechanical property test is: good, the flame retardant grade of the masterbatch with mechanical property test is V1, and the antistatic performance evaluation of the masterbatch with mechanical property test is: good.

[0026] Embodiment three: Step S3: first add the carrier resin and the dispersant into a high-speed mixer for premixing, the speed of the high-speed mixer is 800 rpm, the mixing temperature is 50°C, and the mixing time is 30 minutes, then add the toughener, plasticizer, antioxidant, filler and lubricant into the high-speed mixer in sequence, continue to mix at a speed of 800 rpm for 30 minutes at 50°C, then add the light stabilizer, the compound flame retardant and the microcapsule antistatic agent into the high-speed mixer, mix at a speed of 900 rpm for 40 minutes at 60°C to form a uniform premix, and then transfer the formed premix to an internal mixer for further mixing, wherein the speed of the internal mixer is 90 rpm, the internal mixing temperature is 170°C, and the time is 15 minutes, wherein the mass ratio of the carrier resin, the toughener, the plasticizer, the dispersant, the antioxidant, the filler, the light stabilizer, the lubricant, the compound flame retardant and the microcapsule antistatic agent is 15:3:4:3:1:70:0.5:3:2:1.

[0027] Furthermore, the tensile strength is 31 MPa, the elongation at break is 26%, the flame retardant grade of the masterbatch without mechanical property test is V0, the antistatic performance evaluation of the masterbatch without mechanical property test is: good, the flame retardant grade of the masterbatch with mechanical property test is V0, the antistatic performance evaluation of the masterbatch with mechanical property test is: good.

[0028] Embodiment 4: Step S3: first add the carrier resin and the dispersant into a high-speed mixer for premixing, the speed of the high-speed mixer is 800 rpm, the mixing temperature is 50°C, and the mixing time is 30 minutes, then add the toughener, plasticizer, antioxidant, filler and lubricant into the high-speed mixer in sequence, continue to mix at a speed of 800 rpm for 30 minutes at 50°C, then add the light stabilizer, the compound flame retardant and the microcapsule antistatic agent into the high-speed mixer, mix at a speed of 900 rpm for 40 minutes at 60°C to form a uniform premix, and then transfer the formed premix to an internal mixer for further mixing, wherein the speed of the internal mixer is 90 rpm, the internal mixing temperature is 170°C, and the time is 15 minutes, wherein the mass ratio of the carrier resin, the toughener, the plasticizer, the dispersant, the antioxidant, the filler, the light stabilizer, the lubricant, the compound flame retardant and the microcapsule antistatic agent is 15:3:4:3:1:75:0.5:3:2.5:1.5.

[0029] Furthermore, the tensile strength is 26 MPa, the elongation at break is 22%, the flame retardant grade of the masterbatch without mechanical property test is V0, the antistatic performance evaluation of the masterbatch without mechanical property test is: good, the flame retardant grade of the masterbatch with mechanical property test is V0, the antistatic performance evaluation of the masterbatch with mechanical property test is: very good.

[0030] Comparative Example: Taking the existing filling masterbatch on the market as a comparison example, the tensile strength is 21MPa, the elongation at break is 18%, the flame retardant grade of the masterbatch without mechanical property test is V1, and the antistatic performance evaluation of the masterbatch without mechanical property test is: very good. The flame retardant grade of the masterbatch with mechanical property test is V2, and the antistatic performance evaluation of the masterbatch with mechanical property test is: average.

[0031] The performance test results of the multifunctional filling masterbatch are as follows:

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A toughness-enhanced multifunctional filling masterbatch, characterized in that: The raw materials include the following components by weight: 10-30 parts of carrier resin, 1-10 parts of toughening agent, 2-8 parts of plasticizer, 0.1-5 parts of dispersant, 0.5-3 parts of antioxidant, 60-80 parts of filler, 0.1-2 parts of light stabilizer, 1-7 parts of lubricant, 0.2-6 parts of compound flame retardant and 0.1-5 parts of microcapsule antistatic agent; The multifunctional filling masterbatch is prepared by mixing a carrier resin, a toughening agent, a plasticizer, a dispersant, an antioxidant, a filler, a light stabilizer, a lubricant, a compound flame retardant and a microcapsule antistatic agent.

2. The toughness-enhanced multifunctional filler masterbatch according to claim 1, characterized in that: The compound flame retardant is prepared by mixing decabromodiphenyl ether and magnesium hydroxide in a mass ratio of (1-5):1, and the carrier resin is prepared by mixing PPVC and PP in a mass ratio of (1-3):

1.

3. The toughness-enhanced multifunctional filler masterbatch according to claim 1, characterized in that: The filler is prepared by mixing calcium carbonate, mica and carbon black in a mass ratio of (1-3): (0.5-2): 1, and the particle size of the filler is 5-10 μm.

4. The toughness-enhanced multifunctional filler masterbatch according to claim 1, characterized in that: The antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 264, antioxidant 168 and TPP, and the dispersant is one or more of stearic acid, aluminate coupling agent, titanate coupling agent and EBS.

5. A production process of a toughness-enhanced multifunctional filler masterbatch, applicable to a toughness-enhanced multifunctional filler masterbatch according to any one of claims 1 to 4, characterized in that: The production process of this toughness-enhanced multifunctional filler masterbatch is as follows: Step S1: Pretreatment: pre-treating PPVC, PP, calcium carbonate, mica and carbon black, and mixing the pre-treated PPVC and PP to prepare a carrier resin, and mixing calcium carbonate, mica and carbon black to prepare a filler; Step S2: Preparation of auxiliary agents: preparing a compound flame retardant and a microencapsulated antistatic agent; Step S3: Mixing and kneading: firstly, the carrier resin, toughening agent, plasticizer, dispersant, antioxidant, filler, light stabilizer, lubricant, compound flame retardant and microcapsule antistatic agent are placed in a high-speed mixer in order and proportion for preliminary mixing to form a premix, and then the premix is ​​transferred to an internal mixer for further kneading; Step S4: extrusion granulation: the mixed material is extruded and granulated through a twin-screw extruder to form a multifunctional filling masterbatch; Step S5: Performance test: Performing a performance test on the multifunctional filling masterbatch obtained in step S4; Step S6: Packaging and storage: The prepared filling masterbatch is put into a plastic film bag, the air in the bag is emptied, the packaging opening is sealed, and identification information is affixed, and then it is stored in a dry, ventilated, and light-proof place.

6. The production process of a toughness-enhanced multifunctional filler masterbatch according to claim 5, characterized in that: The step S1 further includes the following steps: Step S11: pretreatment of carrier resin: PPVC and PP are placed in a hot air circulation oven for drying treatment, wherein PPVC is dried at 70-90°C for 10-20 min, and PP is dried at 90-100°C for 10-20 min, then the dried PPVC and PP are placed in a high-speed mixer, and lubricant is added thereto to uniformly mix the two resins, wherein the mass ratio of PPVC, PP and lubricant is (1-3):1:(0.2-0.3), the speed of the high-speed mixer is 800-900 rpm, the mixing temperature is room temperature, and the mixing time is 5-15 min, then the mixed resin is placed in a twin-screw extruder for heating treatment to obtain a carrier resin, wherein the heating temperature is 170-180°C, the heating time is 5-15 min, and the screw speed is 200-400 rpm; Step S12: filler pretreatment: first, the purity and particle size of calcium carbonate, mica and carbon black are tested, and the substances with unqualified purity and particle size are screened out. The calcium carbonate, mica and carbon black are dried in a hot air circulation oven respectively, and then the particle sizes of calcium carbonate, mica and carbon black are screened with a sieve, and the particles with larger particle sizes are placed in a ball mill for grinding, and then screened again. After the screening is completed, the screened calcium carbonate, mica and carbon black are respectively immersed in a silane coupling agent for surface modification. After soaking for 1-2 hours, they are dried at 80°C for 30-40 minutes. Then, the surface-modified calcium carbonate, mica and carbon black are mixed in a mass ratio of (1-3): (0.5-2): 1, wherein the calcium carbonate is dried at a temperature of 110°C for 2 hours, the mica is dried at 90°C for 4 hours, and the carbon black is dried at 100°C for 3 hours. The stirring speed during the mixing process is 80-120rpm, and the stirring time is 30-45min.

7. The production process of a toughness-enhanced multifunctional filler masterbatch according to claim 5, characterized in that: The step S2 further includes the following steps: Step S21: compounding flame retardant: firstly, decabromodiphenyl ether is placed in a vacuum drying oven at 60°C for 2 hours, then magnesium hydroxide is placed in a vacuum drying oven at 100°C for 3 hours, and then magnesium hydroxide and stearic acid are placed in a high-speed mixer for mixing to prepare a compound flame retardant, wherein the mixing temperature is 80°C, the mixing time is 1 to 1.5 hours, the speed of the high-speed mixer is 700 to 800 rpm, and the mass ratio of magnesium hydroxide to stearic acid is 1:(1 to 3); Step S22: Microencapsulation of antistatic agent: Sodium alginate is dissolved in water to form a wall material solution, and then the antistatic agent is dissolved in water to form a uniform antistatic agent solution. The antistatic agent solution and the wall material solution are then mixed and emulsified by ultrasonic emulsification to form a stable emulsion, wherein the stirring speed is 70-80 rpm, the stirring time is 30 min, and the volume ratio of the wall material solution to the antistatic agent solution is (1-3):

1. Subsequently, microencapsulation is performed by complex coacervation, and then cured at 60-70°C to form a stable microcapsule structure, wherein the heating time is 30 min. Subsequently, the microcapsules are separated from the reaction system, washed with clean water, and dried at 40-80°C for 20-40 min to obtain a microencapsulated antistatic agent.

8. The production process of a toughness-enhanced multifunctional filler masterbatch according to claim 5, characterized in that: The step S3 further includes the following steps: Step S31: firstly add the carrier resin and the dispersant into a high-speed mixer for premixing, the speed of the high-speed mixer is 800-900 rpm, the mixing temperature is 40-60° C., and the mixing time is 20-40 min, then add the toughening agent, plasticizer, antioxidant, filler and lubricant into the high-speed mixer in sequence, continue to mix at a speed of 800-900 rpm for 30 min at a temperature of 40-60° C., then add the light stabilizer, the compound flame retardant and the microcapsule antistatic agent into the high-speed mixer, mix at a speed of 900 rpm for 20-45 min at a temperature of 50-70° C., and form a uniform premix; Step S32: Then, the premix formed in step S31 is transferred to an internal mixer for further mixing, wherein the speed of the internal mixer is 80-90 rpm, the internal mixing temperature is 160-190° C., and the mixing time is 10-20 min.

9. The production process of a toughness-enhanced multifunctional filler masterbatch according to claim 5, characterized in that: The step S4 further includes the following steps: Step S41: Extrusion: using a twin-screw extruder to extrude the material mixed in step S3, wherein the temperature of the feed section is 150-160°C, the temperature of the compression section is 180°C, the temperature of the metering section and the die head is 200°C, and the screw speed is 60-80rpm; Step S42: Refining: The extruded material is then refined by an open mill, wherein the roller temperature is 50-55° C. and the roller speed ratio is 1.1, to obtain a uniform multifunctional filling masterbatch.

10. The production process of a toughness-enhanced multifunctional filler masterbatch according to claim 9, characterized in that: The step S5 further includes the following steps: Step S51: testing the mechanical properties of the prepared multifunctional filling masterbatch according to the QB / T1126-2021 polyolefin filling masterbatch standard; Step S52: performing flame retardancy test and antistatic performance test on the masterbatch that has not been subjected to mechanical property test and the masterbatch that has been subjected to mechanical property test, respectively, to obtain flame retardancy grade and antistatic performance evaluation.

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