Antistatic packaging wrapping film and preparation method thereof

Abstract

The invention provides an antistatic packaging wrapping film and a preparation method thereof. A polymer layer comprises the following components in percentage by mass: 75-85% of modified polyethylene, 5-15% of intelligent response type copolymer, 0-2% of nano filler, 3-8% of furan functionalized polyethylene, 0.5% of a lubricant, 0.2% of an antioxidant and 0.1% of a light stabilizer. The core layer comprises the following components in percentage by mass: 75-85% of polyethylene, 10-20% of a block copolymer, 5% of a tackifier, 0.5% of a processing aid and 0.2% of an antioxidant; the conductive layer comprises the following components in percentage by mass: 85-90% of polyethylene, 8-15% of composite conductive filler master batch, 1-3% of a functional aid, 0.2% of an antioxidant and 0.1% of an ultraviolet absorbent; through the design of a three-layer composite structure, the transparent antistatic wrapping film integrates efficient antistatic property, intelligent humidity response, potential self-repairing and excellent mechanical property.

Description

Technical Field

[0001] This invention relates to the field of packaging stretch film technology, specifically to an antistatic packaging stretch film and its preparation method. Background Technology

[0002] As an indispensable material in modern logistics and warehousing, the core function of packaging stretch film is to achieve unitization, stabilization and protective packaging of goods through stretching and wrapping. With the surge in freight volume of static-sensitive items such as electronic products and precision instruments, the market has put forward clear requirements for the anti-static performance of stretch film.

[0003] Currently, the main method to achieve antistatic properties in stretch film is to add small-molecule antistatic agents to the polymer matrix. These agents migrate to the film surface and adsorb ambient moisture to form a conductive layer, thus dissipating charge. However, the antistatic effect of this method is heavily dependent on ambient humidity; its performance deteriorates significantly or even fails in dry environments. Furthermore, the small-molecule agents continue to migrate and volatilize, causing the antistatic performance to rapidly decline with storage and use, failing to meet long-term stable protection requirements. Another method is to fill with conductive materials such as carbon black or metal powder. While this method can achieve durable and humidity-insensitive conductivity, it inevitably results in a black or opaque film, obscuring the appearance of the packaged goods and failing to meet the needs of visual identification and display, thus limiting its application scenarios. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an antistatic packaging stretch film and its preparation method, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An antistatic packaging stretch film includes a polymer layer, a core layer, and a conductive layer; The polymer layer comprises the following components by weight percentage: 75-85% modified polyethylene, 5-15% smart responsive copolymer, 0-2% nanofiller, 3-8% furan functionalized polyethylene, 0.5% lubricant, 0.2% antioxidant, and 0.1% light stabilizer; The core layer comprises the following components by weight percentage: 75-85% polyethylene, 10-20% block copolymer, 5% tackifier, 0.5% processing aid, and 0.2% antioxidant; The conductive layer comprises the following components by weight percentage: 85-90% polyethylene, 8-15% composite conductive filler masterbatch, 1-3% functional additives, 0.2% antioxidant, and 0.1% ultraviolet absorber.

[0006] Furthermore, the thickness ratio of the polymer layer, the core layer, and the conductive layer is 2:2:1.

[0007] Furthermore, the composite conductive filler masterbatch comprises, by weight percentage, 50% low-density polyethylene, 25% silver nanowires, and 25% polydopamine-coated carbon nanotubes.

[0008] This invention provides a method for preparing an antistatic packaging stretch film, comprising: S1. Raw material pretreatment: Prepare all raw materials according to the ratio, and dry the powder and solid raw materials in a drying oven at 50-60℃ for 4-6 hours. S2. Preparation of polymer layer masterbatch: S2.1. Modified polyethylene, smart responsive copolymer, furan functionalized polyethylene, lubricant, antioxidant and light stabilizer are fed into the primary mixing zone of a twin-screw extruder for melt mixing to form a matrix; S2.2 When the matrix enters the high-shear dispersion zone, nanofillers are added for kneading and dispersion to form a polymer mixture; S2.3 The polymer mixture enters the homogenization zone for further homogenization and plasticization. After extrusion, it is cooled and pelletized to obtain polymer layer masterbatch. S3. Preparation of conductive layer masterbatch: S3.1. Polyethylene, antioxidant, ultraviolet absorber and composite conductive filler masterbatch are fed into the primary mixing zone of a twin-screw extruder for melt mixing to form a matrix; S3.2 When the matrix enters the high shear dispersion zone, it is kneaded and dispersed under strong shear force to ensure that the conductive filler is evenly distributed and forms a mixture; S3.3 The mixed material enters the homogenization zone, functional additives are added, and homogenization continues under vacuum. After extrusion, it is cooled and pelletized to obtain conductive layer masterbatch. S4. Core layer masterbatch preparation: S4.1. Polyethylene, block copolymer, processing aids and antioxidants are fed into the primary mixing zone of a twin-screw extruder for melt mixing to form the matrix; S4.2 When the matrix enters the dispersion zone, a thickener is pumped in to knead and disperse it, forming a mixture; S4.3 The mixture enters the homogenization zone for further homogenization, and after extrusion, it is cooled and pelletized to obtain the core layer masterbatch. S5, Multi-layer co-extrusion blown film: The three masterbatches were respectively added to three independent single-screw extruders for melt extrusion; Temperature setting: Polymer layer extruder: 160-185℃; Core extruder: 150-170℃; Conductive layer extruder: 165-180℃; The three-layer melt is brought together by a precision three-layer co-extrusion spiral mandrel, with the die temperature controlled at 175-180℃. By precisely controlling the output of each extruder, the three-layer composite film tube extruded from the die is inflated by internal compressed air and simultaneously pulled by the traction device above to form a bi-directional stretched bubble tube. S6. Cooling and winding: After being inflated, the membrane tube is folded by a herringbone plate and then flattened by traction rollers; The film then passes through multiple guide rollers and cooling rollers to be fully cooled and shaped, and finally wound up to obtain the finished stretch film.

[0009] This invention provides an apparatus for preparing an antistatic packaging stretch film, comprising a twin-screw extrusion assembly, wherein the twin-screw extrusion assembly includes a drive unit, a housing, a heater, a feed port, spiral blades, a dispersing unit, a homogenizing unit, and an extrusion port; The interior of the outer shell is divided into a primary mixing zone, a dispersion zone, and a homogenization zone by two throttle valves; heaters are installed in the primary mixing zone, the dispersion zone, and the homogenization zone, and the sides of the primary mixing zone, the dispersion zone, and the homogenization zone are connected to a feeding port; a spiral blade is provided in the primary mixing zone, a dispersing element is provided in the dispersion zone, and a homogenizing element is provided in the homogenization zone; the spiral blade, the dispersing element, and the homogenizing element are connected to a driving element; an extrusion port is provided at the output end of the homogenization zone; A water tank is provided on the side of the extrusion port, and a guide roller is provided inside the water tank; a pelletizing assembly is provided on the side of the water tank, and a lifting assembly is provided on the side of the pelletizing assembly.

[0010] Furthermore, the driving component includes two sets of screw motors and rotating shafts, with the output end of each screw motor having a rotating shaft; the rotating shaft is inserted into and rotatably connected to the housing, and multiple meshing helical blades are equidistantly distributed on the outside of the two rotating shafts; the helical blades are eccentrically connected to the rotating shafts, and the width of the initial mixing zone gradually decreases; the width of the helical blades gradually decreases. The dispersing component includes a liquid inlet pipe and a helical rotor; streamlined, intermeshing helical rotors are provided outside the two rotating shafts located in the dispersing zone; the top of the dispersing zone is connected to the liquid inlet pipe; The homogenizing component includes a pre-reserved tube and helical teeth; the two rotating shafts in the homogenizing zone have intermittently fixed, meshing helical teeth on their exteriors; and the top of the homogenizing zone is connected to the pre-reserved tube.

[0011] Furthermore, the throttle valve includes a motor, a screw and nut mechanism, a valve core, an inlet, an outlet, a valve port, and a valve seat; the valve seat has an inlet and an outlet at both ends, and a motor is located at the top of the valve seat; the output end of the motor is connected to the valve core through the screw and nut mechanism, and a valve port is located inside the valve seat; the valve port is connected to the valve core and connects the inlet and the outlet.

[0012] Furthermore, the pelletizing assembly includes a lifting screw, a fixed base, a traction component, a fixed blade, a feeding plate, a moving blade, a gear, and a rotary motor; the fixed base is fixed to the top of the water tank, and the lifting screw is internally threaded into the fixed base; the lifting screw and the bottom of the fixed base are provided with a traction component; the side of the traction component is provided with a fixed blade, and the side of the fixed blade is provided with a moving blade; the moving blade is connected to the output end of the rotary motor, and the output end of the rotary motor is connected to a gear; the gear is engaged with and connected to the lifting assembly; the side of the fixed blade is provided with a feeding plate.

[0013] Furthermore, the lifting assembly includes a guard plate, a discharge baffle, a connecting shaft, a toothed plate, a receiving hopper, a rotating disk, a conveyor belt, and rotating wheels; two rotating wheels are provided, and the two rotating wheels are connected by a conveyor belt; toothed plates are fixed on both sides of the conveyor belt, and the toothed plates mesh with gears; a receiving hopper with a grid structure is fixed at the center of the conveyor belt; a connecting shaft is provided between the two rotating wheels, and the connecting shaft is rotatably connected to the top of the water tank; rotating disks are fixed at both ends of the connecting shaft; a guard plate is provided at the top of the water tank, and a discharge baffle is provided on the side of the guard plate.

[0014] Furthermore, it also includes a cooling assembly, which includes a water pump, a cooling fan, and a coil; the cooling fan is fixed to the top of the water tank, and the water pump is installed inside the water tank; the output end of the water pump is connected to the coil, and the coil is located on the side of the cooling fan; the output end of the coil is connected to the water tank, and a reserved pipe is reserved on the side of the water tank.

[0015] This invention provides an antistatic packaging stretch film and its preparation method. Compared with the prior art, it has the following advantages: 1. This invention designs an independent conductive layer and constructs a binary synergistic conductive network using silver nanowires and polydopamine-coated carbon nanotubes. The silver nanowires provide an efficient electron conduction path, while polydopamine modification significantly improves the dispersion and interfacial compatibility of carbon nanotubes in the polyethylene matrix. The combination of these two components forms a stable, interconnected three-dimensional conductive pathway with a relatively low filler content. This structure is independent of environmental humidity, and because the conductive layer is placed at the innermost layer of the film and protected by the core and outer layers, its conductive network is not easily damaged by surface friction or additive volatilization, thus achieving high efficiency and durability of the antistatic effect. Simultaneously, the outer layer remains transparent, not affecting the product's appearance.

[0016] 2. The present invention introduces a smart-responsive copolymer and furan-functionalized polyethylene into the polymer layer; the ionic liquid block in the smart copolymer can respond to changes in environmental humidity. When the humidity increases, the segment mobility enhances, thereby smartly regulating the gas permeability of the film and providing an ideal packaging solution. At the same time, a dynamic crosslinking network can be formed between the furan groups and the maleimide groups from the nano-fillers or grafted polyethylene; this enables the material to self-repair the crack interface when micro-damage occurs, greatly enhancing the durability and reliability of the product and extending its service life.

[0017] 3. The core layer of the present invention adopts a combination of metallocene linear low-density polyethylene and hydrogenated styrene-isoprene-styrene block copolymer, supplemented with a polyisobutene tackifier; after biaxially stretched blown film, the film obtains extremely high tensile toughness, puncture resistance and excellent resilience, ensuring the tightness of bundling.

[0018] 4. The packaging winding film of the present invention adopts a dedicated preparation device, especially its twin-screw extrusion system with zone temperature control, ensuring the perfect dispersion and interfacial combination of each functional component, while improving the material properties, effectively eliminating processing defects such as melt fracture, and ensuring the continuous stability and high yield of production.

[0019] 5. The preparation device supporting the present invention integrates underwater pelletizing, mechanical linkage lifting and on-line air drying functions; through the gear-rack mechanism, the pelletizing power is synchronously transmitted to the lifting system, realizing the full-process continuous production from molten extrusion to dry masterbatch particles; this not only greatly improves the production efficiency, but also ensures the uniform size and low moisture content of the masterbatch particles through stable cooling and cutting control, laying a solid foundation for preparing a final product with consistent performance and high quality by subsequent three-layer co-extrusion blown film; this dedicated device ensures that the complex chemical design and functional materials in the present invention can be precisely and reliably prepared. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 Shows the schematic flow chart of the preparation method of the present invention; Figure 2 Shows the overall structure schematic diagram of the preparation device of the present invention; Figure 3 Shows the structure schematic diagram of the twin-screw technical components of the present invention; Figure 4 The present invention is shown. Figure 3 An enlarged structural diagram at point A in the diagram; Figure 5 A schematic diagram of the pelletizing assembly of the present invention is shown; Figure 6 A schematic diagram of the lifting component of the present invention is shown; Figure 7 A schematic diagram of the structure connecting the toothed plate, the receiving hopper, and the conveyor belt of the present invention is shown. The diagram shows: 100, twin-screw extrusion assembly; 101, drive unit; 1011, screw motor; 1012, rotating shaft; 102, housing; 103, heater; 104, feed port; 105, helical blades; 106, dispersing component; 1061, liquid inlet pipe; 1062, helical rotor; 107, homogenizing component; 1071, pre-installed pipe; 1072, helical teeth; 108, extrusion port; 200, water tank; 300, guide roller; 400, throttle valve; 401, motor; 402, lead screw and nut mechanism; 403, valve core; 404, inlet; 405, outlet; 406, valve port; 407, valve seat. 500. Cooling assembly; 501. Water pump; 502. Cooling fan; 503. Coil; 600. Pelletizing assembly; 601. Lifting screw; 602. Fixed base; 603. Traction component; 6031. Upper traction roller; 6032. Fixed frame; 6033. Fixed rod; 6034. Lower traction roller; 604. Fixed blade; 605. Feeding plate; 606. Moving blade; 607. Gear; 608. Rotary motor; 700. Lifting assembly; 701. Guard plate; 702. Feeding baffle; 703. Connecting shaft; 704. Toothed plate; 705. Receiving hopper; 706. Rotary disc; 707. Conveyor belt; 708. Rotating wheel. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1 To address the technical problems in the background section, the following antistatic packaging stretch film and its preparation method are provided: Specifically, it is an antistatic packaging stretch film, comprising a polymer layer, a core layer, and a conductive layer; The polymer layer comprises the following components by mass percentage: Modified polyethylene 75-85%, preferably linear low-density polyethylene-grafted-maleic anhydride (LLDPE-g-MAH grafting rate 0.8%). The smart responsive copolymer is 5-15%, for example, poly(polyethylene glycol diacrylate-block-1-vinyl-3-ethylimidazolium tetrafluoroborate (P(PEGDA-b-[VEIM][BF4])). The nanofiller is 0-2%, preferably maleimide-functionalized graphite nanosheets (MI-GNP). Furan-functionalized polyethylene (PE-Fu) 3-8%; Lubricant 0.5%, preferably erucamide; Antioxidant 0.2%, preferably pentaerythritol tetra(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), such as Irganox 1010; The light stabilizer is 0.1%, preferably poly{[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][2-(2,2,6,6-tetramethylpiperidinyl)imino]-hexamethylene-[4-(2,2,6,6-tetramethylpiperidinyl)imino]}, such as Chimassorb 944.

[0024] Specific implementation example: The polymer layer comprises the following components by mass percentage: Linear low-density polyethylene-grafted-maleic anhydride 82.5% Poly(polyethylene glycol diacrylate-block-1-vinyl-3-ethylimidazolium tetrafluoroborate) (Smart responsive polymer) 10.0% Maleimide-functionalized graphite nanosheets 1.0% Furan-functionalized polyethylene 4.0% Erucamide 0.5% Pentaerythritol tetra(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) 0.2% Poly{[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][2-(2,2,6,6-tetramethylpiperidinyl)imino]-hexamethylene-[4-(2,2,6,6-tetramethylpiperidinyl)imino]} 0.1%.

[0025] The core layer comprises the following components by mass percentage: Polyethylene 75-85%, preferably metallocene linear low-density polyethylene, such as Exceed 1018; Block copolymer 10-20%, preferably hydrogenated styrene-isoprene-styrene block copolymer, such as Septon 4033; 5% thickener, preferably polyisobutylene; Processing aids: 0.5%, preferably fluororubber-based processing aids; Antioxidant 0.2%; preferably, a composite antioxidant system is used (primary antioxidant Irganox 1010 / secondary antioxidant Irgafos 168 = 1:2). Specific implementation example: The core layer comprises the following components by mass percentage: Metallocene linear low-density polyethylene 79.3% Hydrogenated styrene-isoprene-styrene block copolymer 15.0% Polyisobutylene 5.0% Fluororubber processing aids 0.5% 0.2% of the compound antioxidant system The conductive layer comprises the following components by mass percentage: Polyethylene 85-90%, preferably linear low-density polyethylene, such as 7042; The composite conductive filler masterbatch comprises 8-15% by weight, preferably, the composite conductive filler masterbatch includes the following percentage by weight: Low-density polyethylene 50% Silver nanowires (diameter ~50nm, aspect ratio >500) 25% Polydopamine-coated carbon nanotubes (CNT purity >95%, PDA coating layer ~5nm) 25%; Functional additives 1-3%, preferably perfluoroalkyl ethyl acrylate copolymers; Antioxidant 0.2%, using pentaerythritol tetra(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), such as Irganox 1010; The ultraviolet absorber is 0.1%, preferably (2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole), such as Tinuvin 326.

[0026] In a specific implementation example, the conductive layer comprises the following components by mass percentage: Linear low-density polyethylene 88.4% The composite conductive filler masterbatch is 10.0%, of which: the masterbatch consists of 50% linear low-density polyethylene, 25% silver nanowires, and 25% polydopamine-coated carbon nanotubes; 1.0% of perfluoroalkyl ethyl acrylate copolymer Pentaerythritol tetra(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) 0.2% 0.1% of 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole.

[0027] The antistatic packaging wrapping film of the present invention has a thickness ratio of 2:2:1 for the polymer layer, the core layer and the conductive layer.

[0028] The antistatic packaging wrapping film of this invention features a conductive layer that concentrates conductivity into a single layer. This layer constructs a highly efficient conductive network using silver nanowires and polydopamine-coated carbon nanotubes. The silver nanowires provide extremely high conductivity, enabling rapid charge leakage. The polydopamine-coated carbon nanotubes improve the dispersibility of polydopamine in polyethylene, preventing aggregation, and synergize with the silver nanowires to form a combined three-dimensional conductive pathway. This achieves excellent conductivity with a relatively small amount of filler, resulting in highly efficient, stable, and humidity-independent antistatic performance. Furthermore, because the conductive layer is the innermost layer, protected by the core layer and polymer layer, it is not easily worn down by friction, ensuring long-lasting performance. Simultaneously, the outer layer is a transparent polymer layer, which does not affect the product's appearance and visibility.

[0029] The present invention incorporates a smart responsive copolymer within the polymer layer. This copolymer contains ionic liquid blocks. In a dry environment, its molecular chain mobility is poor; however, when ambient humidity increases, the ionic liquid absorbs moisture, enhancing molecular chain mobility and causing a controllable change in the film's permeability. This copolymer can synergistically work with furan-functionalized polyethylene to achieve a degree of reversible mixing and homogenization through the Diels-Alder reaction, providing the material with the potential for self-healing from micro-damage.

[0030] The core layer of this invention uses metallocene linear low-density polyethylene and hydrogenated styrene-isoprene-styrene block copolymer. The metallocene linear low-density polyethylene has a narrow molecular weight distribution and a regular branched structure, giving the film extremely high tensile toughness, puncture strength, and impact strength. The hydrogenated styrene-isoprene-styrene block copolymer, as a high-performance thermoplastic elastomer, acts as an excellent toughening agent, further absorbing and dispersing stress, making the film less prone to breakage during high-speed stretching and winding, exhibiting good resilience, and providing more secure binding.

[0031] The functional groups in the linear low-density polyethylene-grafted maleic anhydride and maleimide functionalized graphite nanosheets in the polymer layer can react, which greatly improves the interfacial compatibility between the nanofiller and the polymer matrix, reduces stress concentration, and strengthens the nanofiller without reducing its toughness.

[0032] The fluororubber-based processing aids in the core layer of this invention effectively reduce melt viscosity, eliminate the sharkskin effect, and make extrusion more stable, improving yield and quality. Erucamide in the polymer layer migrates to the surface, reducing the film's coefficient of friction and making it smoother during winding and unwinding. The addition of high-efficiency additives such as primary antioxidants and light stabilizers / UV absorbers forms a comprehensive anti-aging protection system, effectively preventing degradation and yellowing caused by heat, oxygen, and ultraviolet radiation during processing, storage, and use, thus extending service life.

[0033] The furan groups provided by furan-functionalized polyethylene offer active sites for further functionalization modification of the material surface via the Diels-Alder reaction. The perfluoroalkyl ethyl acrylate copolymer in the conductive layer is an excellent surface modifier that can migrate to the conductive layer surface, imparting hydrophobic and oleophobic properties and preventing oil stains, fingerprints, and other contaminants during packaging.

[0034] Example 2 like Figure 1 As shown, the present invention also provides a method for preparing an antistatic packaging stretch film, comprising: S1. Raw material pretreatment: Prepare all raw materials according to the formula, and dry the powder and solid raw materials in a drying oven at 50-60℃ for 4-6 hours.

[0035] S2. Preparation of polymer layer masterbatch: S2.1. Modified polyethylene, smart responsive copolymer, furan functionalized polyethylene, lubricant, antioxidant and light stabilizer are fed into the primary mixing zone of a twin-screw extruder for melt mixing to form the matrix.

[0036] S2.2 When the matrix enters the high-shear dispersion zone, nanofillers are added for kneading and dispersion to form a polymer mixture.

[0037] S2.3 The polymer mixture enters the homogenization zone for further homogenization and plasticization. After extrusion, it is cooled and pelletized to obtain the polymer layer masterbatch. This stage creates conditions for the subsequent reversible crosslinking reaction.

[0038] S3. Preparation of conductive layer masterbatch: S3.1. Polyethylene, antioxidant, ultraviolet absorber and composite conductive filler masterbatch are fed into the primary mixing zone of a twin-screw extruder for melt mixing to form a matrix.

[0039] S3.2 When the matrix enters the high shear dispersion zone, it is kneaded and dispersed under strong shear force to ensure that the conductive filler is evenly distributed and forms a mixture.

[0040] S3.3 The mixed material enters the homogenization zone, functional additives are added, and homogenization continues under vacuum. After extrusion, it is cooled and pelletized to obtain the conductive layer masterbatch.

[0041] S4. Core layer masterbatch preparation: S4.1. Polyethylene, block copolymer, processing aids and antioxidants are fed into the primary mixing zone of a twin-screw extruder for melt mixing to form the matrix.

[0042] S4.2 When the matrix enters the dispersion zone, a thickener is pumped in to knead and disperse it, forming a mixture.

[0043] S4.3 The mixed material enters the homogenization zone for further homogenization, is then extruded, cooled, and pelletized to obtain the core layer masterbatch.

[0044] S5, Multi-layer co-extrusion blown film: The three masterbatches were added to three separate single-screw extruders for melt extrusion.

[0045] Temperature setting: Polymer layer extruder: 160-185℃, temperature control to avoid reverse Diels-Alder reaction.

[0046] Core extruder: 150-170℃, lower temperature to maintain the effectiveness of the tackifier.

[0047] Conductive layer extruder: 165-180℃, moderate temperature and shear force to form a conductive network.

[0048] The three layers of melt are joined together through a precision three-layer co-extrusion spiral mandrel, with the die head temperature controlled at 175-180℃.

[0049] By precisely controlling the output of each extruder, the thickness ratio of the polymer layer, core layer, and conductive layer is made to be 2:2:1.

[0050] The three-layer composite membrane tube extruded from the die head is inflated by internal compressed air at an inflation ratio of 2.0-2.5, and is simultaneously pulled by the traction device above to form a bidirectional stretched bubble tube.

[0051] S6. Cooling and winding: After being inflated, the membrane tube is folded by a herringbone plate and then flattened by a traction roller.

[0052] The film then passes through multiple guide rollers and cooling rollers to be fully cooled and shaped, and finally wound up to obtain the finished stretch film.

[0053] The method of this invention, combined with a suitable processing temperature, ensures that the conductive layer masterbatch forms a complete and stable three-dimensional conductive network of silver nanowires and carbon nanotubes; it also ensures that the antistatic effect does not migrate over time or depend on environmental humidity. The furan and maleimide groups in the low-temperature processed polymer layer are retained, providing the possibility for self-repair through the Diels-Alder reaction when microcracks occur due to friction and stress during material use.

[0054] The metallocene linear low-density polyethylene and block copolymers in the core layer masterbatch undergo biaxial stretching during blown film production, resulting in highly oriented molecular chains that form a tough skeleton, making the film extremely durable and resistant to puncture. The block copolymer elastomers and tackifiers in the core layer, combined with the biaxial stretching structure, enable the film to generate continuous and uniform shrinkage stress after winding, resulting in tighter binding and reduced susceptibility to loosening.

[0055] The stepwise masterbatch preparation ensures sufficient dispersion of all additives, especially nanofillers, reducing scattering points caused by agglomeration. The three-layer interface fuses well in the co-extrusion die, avoiding interfacial delamination or increased haze due to poor compatibility.

[0056] Example 3 This invention also provides an apparatus for preparing an antistatic packaging stretch film; such as Figure 2 As shown, it includes: A twin-screw extrusion assembly 100 includes a drive unit 101, a housing 102, a heater 103, a feed port 104, a spiral blade 105, a dispersing unit 106, a homogenizing unit 107, and an extrusion port 108. The interior of the outer shell 102 is divided into a primary mixing zone, a dispersion zone, and a homogenization zone by two throttle valves 400. Heaters 103 are installed in each of the primary mixing zone, the dispersion zone, and the homogenization zone to heat and melt the material within the extrusion assembly. The heaters 103 in each zone are separately arranged to form independent heating areas, facilitating different temperatures in each zone. Furthermore, the primary mixing zone, the dispersion zone, and the homogenization zone are connected to a feed port 104 on their sides to allow for the timely addition of materials when processing the polymer layer, core layer, and conductive layer masterbatch. The initial mixing zone is equipped with helical blades 105, the dispersion zone is equipped with a dispersing element 106, and the homogenization zone is equipped with a homogenizing element 107. The helical blades 105, the dispersing element 106, and the homogenizing element 107 are connected to a drive unit 101. The output end of the homogenization zone is equipped with an extrusion port 108. The drive unit 101 includes two sets of screw motors 1011 and a rotating shaft 1012. The output end of the screw motors 1011 is equipped with a rotating shaft 1012. The rotating shaft 1012 is inserted into and rotatably connected to the outer shell 102, and multiple meshing helical blades 105 are equidistantly distributed on the outside of the two rotating shafts 1012. The helical blades 105 are eccentrically connected to the rotating shafts 1012, and the width of the initial mixing zone gradually decreases. The width of the helical blades 105 also gradually decreases. The eccentric design of the helical blades 105 and the gradually decreasing area increase melting efficiency and pressure. The dispersing component 106 includes a liquid inlet pipe 1061 and a spiral rotor 1062; streamlined intermeshing spiral rotors 1062 are provided outside the two rotating shafts 1012 in the dispersion zone; the top of the dispersion zone is connected to the liquid inlet pipe 1061, and the spiral rotor 1062 adopts a streamlined structure to reduce material adhesion and improve medium to high degree of meshing.

[0057] The homogenizing component 107 includes a pre-reserved tube 1071 and helical teeth 1072; the helical teeth 1072 are intermittently fixed and mesh with each other on the outside of the two rotating shafts 1012 in the homogenizing zone; and the top of the homogenizing zone is connected to the pre-reserved tube 1071. The intermittently arranged helical teeth 1072 provide space for the material to melt and contact.

[0058] The throttle valve 400 includes a motor 401, a lead screw and nut mechanism 402, a valve core 403, an inlet 404, an outlet 405, a valve port 406, and a valve seat 407; as shown Figure 3 As shown, the valve seat 407 has an inlet 404 and an outlet 405 at its two ends, and a motor 401 is provided at the top of the valve seat 407; the output end of the motor 401 is connected to the valve core 403 through a screw and nut mechanism 402, and a valve port 406 is provided inside the valve seat 407; the valve port 406 is connected to the valve core 403, and the valve port 406 connects the inlet 404 and the outlet 405. Detection components are installed in the initial mixing zone, the dispersion zone, and the homogenization zone. When the required state is detected, the throttle valve 400 is opened to allow the material to enter the next zone. When opened, the motor 401 drives the screw and nut mechanism 402 to work, which in turn drives the valve core 403 to rise, moving the valve core 403 away from the valve port 406, so that the inlet 404 and the outlet 405 are connected. At this time, the throttle valve 400 is in the open state. Conversely, the motor 401 reverses, causing the valve core 403 to fall. At this time, the valve core 403 approaches and inserts into the valve port 406, so that the inlet 404 and the outlet 405 are not connected. At this time, the throttle valve 400 is in the closed state.

[0059] A water tank 200 is provided on the side of the extrusion port 108, and a guide roller 300 is provided inside the water tank 200; a pelletizing assembly 600 is provided on the side of the water tank 200, and a lifting assembly 700 is provided on the side of the pelletizing assembly 600. Specifically, the pelletizing assembly 600 includes a lifting screw 601, a fixed base 602, a traction component 603, a fixed blade 604, a feeding plate 605, a moving blade 606, a gear 607, and a rotary motor 608; as shown Figure 4As shown, the fixing seat 602 is fixed to the top of the water tank 200, and the fixing seat 602 is internally threaded to the lifting screw 601. The lifting screw 601 and the bottom of the fixing seat 602 are provided with a traction member 603. The traction member 603 includes an upper traction roller 6031, a fixing frame 6032, a fixing rod 6033 and a lower traction roller 6034. The bottom of the lifting screw 601 is fixed to the fixing frame 6032, and the upper traction roller 6031 is rotatably connected between the fixing frames 6032. The bottom of the fixing seat 602 is fixed to the fixing rod 6033, and the bottom of the fixing rod 6033 is rotatably connected to the lower traction roller 6034. The traction member 603 has a fixed blade 604 on its side, and the fixed blade 604 has a movable blade 606 on its side; the movable blade 606 is connected to the output end of the rotary motor 608, and the output end of the rotary motor 608 is connected to the gear 607; the gear 607 is connected to the lifting assembly 700; the fixed blade 604 has a feeding plate 605 on its side.

[0060] The lifting assembly 700 includes a guard plate 701, a discharge baffle 702, a connecting shaft 703, a toothed plate 704, a receiving hopper 705, a rotating disk 706, a conveyor belt 707, and a rotating wheel 708; as shown Figure 5 and Figure 6 As shown, there are two rotating wheels 708, which are connected by a conveyor belt 707. Toothed plates 704 are fixed on both sides of the conveyor belt 707, and the toothed plates 704 mesh with gears 607. A receiving hopper 705 with a grid structure is fixed at the center of the conveyor belt 707. A connecting shaft 703 is provided between the two rotating wheels 708, and the connecting shaft 703 is rotatably connected to the top of the water tank 200. Rotary disks 706 are fixed at both ends of the connecting shaft 703. A protective plate 701 is provided at the top of the water tank 200, and a discharge baffle 702 is provided on the side of the protective plate 701. During underwater pelleting, the cooled masterbatch is conveyed to the surface of the fixed blade 604 via the upper traction roller 6031 and the lower traction roller 6034. The rotary motor 608 drives the moving blade 606 to rotate, which cuts the cooled masterbatch. The cut masterbatch enters the receiving hopper 705 along with the feeding plate 605. The feeding plate 605 can be set with a U-shaped cross section to facilitate the masterbatch in the feeding plate 605 to enter the receiving hopper 705 under the pressure of gravity and other masterbatch. When the moving blade 606 is working, the gear 607 meshes with the toothed plate 704, thereby driving the conveyor belt 707 to rotate, causing the receiving hopper 705, which receives the masterbatch, to move upward until it flips and pours the masterbatch into the feeding baffle 702. The cycle continues, and the receiving hopper 705 passes between the two rotating discs 706 and continues to move to receive and transport subsequent materials.

[0061] The present invention also includes a cooling assembly 500, which includes a water pump 501, a cooling fan 502, and a coil 503. The cooling fan 502 is fixed to the top of the water tank 200, and the water pump 501 is installed inside the water tank 200. The output end of the water pump 501 is connected to the coil 503, which is located on the side of the cooling fan 502. The output end of the coil 503 is connected to the water tank 200, and a reserved pipe 1071 is provided on the side of the water tank 200. The cooling assembly 500 pumps cooling water for cooling the extruded masterbatch into the coil 503 via the water pump 501, cools it through the cooling fan 502, and then returns it to the water tank 200. Cooling water can also continue to be input and output into the water tank 200 through the reserved pipe to keep the water in the water tank 200 in a cooling state. The air blown by the cooling fan 502 is directed towards the retrieved and lifted masterbatch, which can dry the retrieved and lifted masterbatch.

[0062] The preparation apparatus of this invention is specifically designed for the preparation of the three-layer masterbatch of the antistatic winding film of this invention. Its core lies in the twin-screw extrusion assembly 100, which precisely achieves the functionalized preparation of each layer of masterbatch through zoned temperature control and segmented feeding. The entire implementation process is as follows: Phase 1: Working process of the twin-screw extrusion assembly 100 1. Initial Mixing Zone: Melting and initial mixing of the matrix polymer. First, the heater 103 in the initial mixing zone is activated, and the temperature is set above the melting temperature of the polymer matrix; for example, 170°C is set when preparing the polymer layer. Then, the main polymer resin, such as modified polyethylene, smart responsive copolymer, furan-functionalized polyethylene, and small molecule additives such as lubricants and antioxidants, is fed into the zone through the feed port 104. The drive unit 101 drives two rotating shafts 1012 to rotate in opposite directions, and the eccentric helical blades 105 with gradually decreasing width rotate accordingly. The helical blades 105 of the present invention generate strong shearing and extrusion effects, and the eccentric design causes the material to be subjected to constantly changing gap extrusion during the conveying process, forming strong axial and radial mixing. Gradually decreasing width and narrowing zone: like a dynamic screw compressor, the compression ratio it experiences gradually increases as the material is conveyed forward, greatly improving the melting efficiency and material pressure, ensuring that the solid material melts rapidly and achieves initial uniform mixing with the liquid additives to form a homogeneous melt matrix.

[0063] 2. Dispersion Zone: Efficient Dispersion of Nanofillers and Functional Additives Once the material in the initial mixing zone reaches predetermined states (such as temperature and pressure) as detected by the detection components, the motor 401 of the throttle valve 400 starts, lifting the valve core 403 via the screw and nut mechanism 402, opening the valve port 406, allowing the initially mixed material to enter the dispersion zone. Simultaneously, nanofillers or conductive fillers are precisely added through the feed port 104 in this zone, and liquid additives are added through the liquid inlet pipe 1061 if necessary. The spiral rotor 1062 adopts a streamlined meshing design; it can apply strong and uniform shear force to the material, acting like countless high-speed rotating scrapers to completely break up the agglomerates of nanofillers. At the same time, the streamlined surface effectively reduces the adhesion of high-viscosity melt to the rotor, ensuring the continuity and stability of material transport. For the conductive layer masterbatch, the strong shear field formed in this area is a key step in ensuring the uniform dispersion and initial bonding of silver nanowires and carbon nanotubes to form a conductive network.

[0064] 3. Homogenization Zone: Final homogenization, devolatilization, and functional assignment The uniformly dispersed material enters the homogenization zone through the second throttle valve 400. Here, functional additives such as perfluoroalkyl ethyl acrylate copolymers can be added through the pre-reserved tube 1071, or the vacuum system can be activated to remove low-molecular-weight volatiles through devolatilization. The helical teeth 1072 in this zone employ an intermittent meshing design. This provides space for the material to breathe and redistribute, achieving low-speed, high-intensity mixing. For polymer layer masterbatches, the mild shearing and precise temperature control in this stage prevent the reverse Diels-Alder reaction, creating an ideal reaction environment and residence time for the reversible crosslinking of furan and maleimide groups, achieving the initial functionalization of the material.

[0065] Finally, the fully homogenized and plasticized material is extruded from the extrusion port 108 in a strip shape.

[0066] Phase Two: Cooling, Pelletizing, and Conveying 4. Cooling and pelletizing The high-temperature strip-shaped masterbatch extruded from the extrusion port 108 first enters a water tank 200 filled with cooling water, passing over the guide roller 300 for thorough cooling and solidification. Subsequently, the cooled and shaped strip is fed into the pelletizing assembly 600. The upper traction roller 6031 and lower traction roller 6034 clamp the strip, providing stable traction. The height of the upper traction roller 6031 can be adjusted by rotating the lifting screw 601 to accommodate strips of different diameters and ensure clamping force. The uniformly advancing strip reaches the fixed cutter 604, where the rotary motor 608 drives the moving cutter 606 to rotate at high speed, cooperating with the fixed cutter 604 to precisely cut the continuous strip into uniformly sized masterbatch particles.

[0067] The cut masterbatch particles fall through the feeding plate 605 into the receiving hopper 705 of the lifting assembly 700. The output end of the rotary motor 608 meshes with the toothed plate 704 on the side of the conveyor belt 707 via the gear 607. This means that pelletizing and lifting are carried out synchronously; as long as pelletizing is in progress, the lifting device will continue to work, achieving a high degree of automation. The conveyor belt 707 drives the fully loaded receiving hopper 705 upward. When passing the top rotating wheel 708, the receiving hopper 705 flips, pouring the masterbatch particles into the feeding baffle 702, finally completing the discharge. During this process, the cooling fan 502 of the cooling assembly 500 blows air onto the freshly discharged and lifted masterbatch, performing preliminary air drying to prevent residual moisture on the particle surface.

[0068] The device of this invention utilizes a high-intensity, uniform shear field generated by the streamlined meshing helical rotor 1062 in the dispersion zone to completely break up the aggregates of nanofillers and conductive fillers, allowing them to be uniformly dispersed at the nanoscale within the polymer matrix. For the polymer layer, this achieves enhanced toughness without reducing toughness, avoiding stress concentration points. For the conductive layer, this is a prerequisite for constructing an efficient and stable three-dimensional conductive network, ensuring the high efficiency and stability of antistatic properties; and enabling the precise construction and preservation of intelligent response and self-healing chemical structures.

[0069] The mild shearing and sufficient residence time provided by the intermittent meshing helical teeth 1072 in the homogenization zone of this invention, combined with an independent and precise temperature control system, create ideal conditions for the reversible Diels-Alder reaction between furan and maleimide groups. This successfully preserves the self-healing potential of the material within the polymer layer. When micro-damage occurs in the film, it can self-repair under suitable conditions, greatly improving the product's durability and reliability. Simultaneously, precise low-temperature control ensures that this function is not compromised during processing.

[0070] The eccentrically narrowing design of the initial mixing zone in this invention enables rapid melting and preliminary mixing of the matrix resin; the throttling valve 400 ensures sufficient reaction time for the material in each functional zone; the vacuum devolatilization function of the homogenization zone removes small molecule volatiles, improving the purity of the masterbatch. This ensures the high quality and consistency of the masterbatch. The maintenance of the core layer tackifier's effectiveness, the integrity of the conductive network in the conductive layer, and the activity of the smart molecules in the polymer layer all benefit from this low-damage, high-efficiency processing method.

[0071] This invention integrates underwater pelletizing with a linked lifting and drying system, combining extrusion, cooling, pelletizing, conveying, and drying into a continuous production line. Eliminating the need for intermediate transfers and separate drying significantly shortens the production cycle and increases capacity. The automated process avoids quality fluctuations caused by human intervention, ensuring high consistency in the geometry, moisture content, and properties of each batch of masterbatch.

[0072] The design, featuring independent temperature control for each zone, throttle valve-controlled material conveying, and adjustable traction roller pressure, provides the unit with exceptional process flexibility. Operators can precisely optimize process parameters for different formulations, such as polymer layers / core layers / conductive layers, by adjusting shear strength in the dispersion zone and residence time in the homogenization zone to suit different material properties and achieve optimal processing results.

[0073] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0074] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An antistatic packaging wrapping film, characterized by: The polymer layer, the core layer and the conductive layer comprise a modified polyethylene, a smart response copolymer, a nano filler, a furan functionalized polyethylene, a lubricant, an antioxidant and a light stabilizer; The polymer layer comprises the following components by mass percentage: modified polyethylene 75-85%, smart response copolymer 5-15%, nano filler 0-2%, furan functionalized polyethylene 3-8%, lubricant 0.5%, antioxidant 0.2% and light stabilizer 0.1%; The core layer comprises the following components by mass percentage: polyethylene 75-85%, block copolymer 10-20%, tackifier 5%, processing aid 0.5% and antioxidant 0.2%; The conductive layer comprises the following components by mass percentage: polyethylene 85-90%, composite conductive filler masterbatch 8-15%, functional additive 1-3%, antioxidant 0.2% and ultraviolet absorber 0.1%.

2. An antistatic packaging wrapping film according to claim 1, characterized in that: The thickness ratio of the polymer layer, the core layer and the conductive layer is 2:2:

1.

3. An antistatic packaging wrapping film according to claim 2, characterized in that: The composite conductive filler masterbatch comprises low-density polyethylene 50%, silver nanowire 25% and polydopamine-coated carbon nanotube 25% by mass percentage.

4. A method for producing an antistatic packaging wrapping film, characterized by: The method comprises the following steps: S1, raw material pretreatment: prepare all raw materials according to the proportion, dry the powder and solid raw materials in a 50-60℃ drying box for 4-6 hours; S2, polymer layer masterbatch preparation: S2.1, melt and mix the modified polyethylene, the smart response copolymer, the furan functionalized polyethylene, the lubricant, the antioxidant and the light stabilizer in the initial mixing area of the double-screw extruder to form a matrix; S2.2, when the matrix enters the high-shear dispersion area, add the nano filler for chelation and dispersion to form a polymer mixture; S2.3, continue to homogenize and plasticize the polymer mixture in the homogenization area, cool and cut after extrusion to obtain the polymer layer masterbatch; S3, conductive layer masterbatch preparation: S3.1, melt and mix the polyethylene, the antioxidant, the ultraviolet absorber and the composite conductive filler masterbatch in the initial mixing area of the double-screw extruder to form a matrix; S3.2, when the matrix enters the high-shear dispersion area, knead and disperse under strong shear force to ensure uniform distribution of the conductive filler, and form a mixture; S3.3, add the functional additive to the mixture in the homogenization area, continue to homogenize under vacuum, cool and cut after extrusion to obtain the conductive layer masterbatch; S4, core layer masterbatch preparation: S4.1, melt and mix the polyethylene, the block copolymer, the processing aid and the antioxidant in the initial mixing area of the double-screw extruder to form a matrix; S4.2, when the matrix enters the dispersion area, pump in the tackifier for kneading and dispersion to form a mixture; S4.3, continue to homogenize the mixture in the homogenization area, cool and cut after extrusion to obtain the core layer masterbatch; S5, multi-layer co-extrusion film blowing: Melt and extrude the above three masterbatches in three independent single-screw extruders respectively; Temperature setting: polymer layer extruder: 160-185℃; core layer extruder: 150-170℃; conductive layer extruder: 165-180℃; The three-layer melt is combined through a precise three-layer co-extrusion spiral core die, and the die temperature is controlled at 175-180℃; the three-layer composite film tube extruded from the die is blown up by internal compressed air and pulled by the upper pulling device to form a bidirectional stretched bubble tube; S6, cooling and winding: The blown film tube is folded by the herringbone plate and clamped by the pulling roller. The film is then passed through a plurality of guide rollers and cooling rollers, fully cooled and shaped, and finally wound to obtain the finished wrapping film.

5. The apparatus for producing an antistatic wrapping film according to claim 3, wherein: The double-screw extrusion assembly (100) comprises a driving member (101), an outer shell (102), a heater (103), a feeding port (104), helical blades (105), a dispersion member (106), a homogenizing member (107), and an extrusion port (108); The interior of the outer shell (102) is divided into a preliminary mixing zone, a dispersion zone, and a homogenizing zone by two throttle valves (400); wherein the preliminary mixing zone, the dispersion zone, and the homogenizing zone are each provided with a heater (103), and the preliminary mixing zone, the dispersion zone, and the homogenizing zone are connected to the feeding port (104) on the side; the preliminary mixing zone is provided with helical blades (105), the dispersion zone is provided with a dispersion member (106), and the homogenizing zone is provided with a homogenizing member (107); the helical blades (105), the dispersion member (106), and the homogenizing member (107) are connected to the driving member (101); and the output end of the homogenizing zone is provided with an extrusion port (108); The side of the extrusion port (108) is provided with a water tank (200), and the water tank (200) is provided with a guide roller (300); the side of the water tank (200) is provided with a pelletizing assembly (600), and the side of the pelletizing assembly (600) is provided with a lifting assembly (700).

6. An apparatus for producing an antistatic packaging wrapping film according to claim 5, characterized in that: The driving member (101) comprises two groups of screw motors (1011) and rotating shafts (1012), the output end of the screw motor (1011) is provided with a rotating shaft (1012); the rotating shaft (1012) is inserted into and rotatably connected to the outer shell (102), and the outer portions of the two rotating shafts (1012) are equidistantly provided with a plurality of helical blades (105) that are meshed with each other; the helical blades (105) are connected to the rotating shafts (1012) in an eccentric manner, and the width of the preliminary mixing zone gradually decreases; and the width of the helical blades (105) gradually decreases; The dispersion member (106) comprises a liquid inflow pipe (1061) and a helical rotor (1062); the outer portions of the two rotating shafts (1012) in the dispersion zone are provided with helical rotors (1062) that are meshed with each other in a streamlined manner; and the top end of the dispersion zone is connected to the liquid inflow pipe (1061); The homogenizing member (107) comprises a pre-reserve pipe (1071) and a helical tooth (1072); the outer portions of the two rotating shafts (1012) in the homogenizing zone are intermittently fixed with helical teeth (1072) that are meshed with each other; and the top end of the homogenizing zone is connected to the pre-reserve pipe (1071).

7. An apparatus for producing an antistatic packaging wrapping film according to claim 6, characterized in that: The throttle valve (400) includes a motor (401), a screw nut mechanism (402), a valve core (403), an inlet (404), an outlet (405), a valve port (406) and a valve seat (407); both ends of the valve seat (407) are respectively provided with the inlet (404) and the outlet (405), and the top end of the valve seat (407) is provided with the motor (401); the output end of the motor (401) is connected with the valve core (403) through the screw nut mechanism (402), and the valve seat (407) is provided with the valve port (406); the valve port (406) is connected with the valve core (403) in a matched mode, and the valve port (406) is connected with the inlet (404) and the outlet (405).

8. An apparatus for producing an antistatic packaging wrapping film according to any one of claims 5 to 7, characterized in that: The cutting assembly (600) includes a lifting screw (601), a fixed seat (602), a traction member (603), a fixed knife (604), a blanking plate (605), a moving knife (606), a gear (607) and a rotary motor (608); the fixed seat (602) is fixed at the top end of the water tank (200), the fixed seat (602) is threadedly connected with the lifting screw (601), the fixed seat (602) is provided with the traction member (603) at the bottom end, the traction member (603) is provided with the fixed knife (604) at the side, and the fixed knife (604) is provided with the moving knife (606) at the side; the moving knife (606) is connected to the output end of the rotary motor (608), the output end of the rotary motor (608) is connected with the gear (607), the gear (607) is connected with the lifting assembly (700) in a matched mode, and the fixed knife (604) is provided with the blanking plate (605) at the side.

9. The apparatus for producing an antistatic packaging wrapping film according to claim 8, characterized in that: The lifting assembly (700) includes a guard plate (701), a blanking baffle (702), a connecting shaft (703), a toothed plate (704), a receiving hopper (705), a rotating disc (706), a conveying belt (707) and a rotating wheel (708); the rotating wheel (708) is provided with two, and the two rotating wheels (708) are connected through the conveying belt (707); the conveying belt (707) is fixed with the toothed plate (704) at both sides, and the toothed plate (704) is engaged with the gear (607); the receiving hopper (705) of the grid structure is fixed at the center of the conveying belt (707); the connecting shaft (703) is arranged between the two rotating wheels (708), and the connecting shaft (703) is rotatably connected to the top end of the water tank (200); the rotating disc (706) is fixed at both ends of the connecting shaft (703); the top end of the water tank (200) is provided with the guard plate (701), and the side of the guard plate (701) is provided with the blanking baffle (702).

10. The apparatus for producing an antistatic packaging wrapping film according to claim 9, characterized in that: Also include cooling assembly (500), the cooling assembly (500) includes water pump (501), heat dissipation fan (502) and coil pipe (503), the top of the water tank (200) is fixed heat dissipation fan (502), the water pump (501) is installed in water tank (200), the output end of water pump (501) is connected with coil pipe (503), and the coil pipe (503) is located in the side of heat dissipation fan (502), the output end of coil pipe (503) is communicated with water tank (200), and the side of water tank (200) is reserved with reserved pipe (1071).

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