Anti-sticking and slip masterbatch for cast film and preparation method thereof

Abstract

This invention relates to the field of plastic film technology, specifically to an anti-sticking and slip-resistant masterbatch for cast films and its preparation method. By weight percentage, the components include: 1-15% erucamide, 1-12% slip agent, 1-15% erucamide-modified silica, 1-12% anti-sticking agent, 0.1-3% additives, and carrier resin to make up the balance; the slip agent includes at least one of saturated amides, bifunctional amides, and long-chain siloxanes. This masterbatch allows cast films containing it to maintain excellent optical properties, while controlling the initial coefficient of friction to within 0.4, and the fluctuation rate of the coefficient of friction ≤20%, thus resolving the contradiction between unstable coefficient of friction and deteriorated optical performance in existing technologies.

Description

Technical Field

[0001] This invention relates to the field of plastic film technology, specifically to an anti-sticking and slip-resistant masterbatch for cast films and its preparation method. Background Technology

[0002] Cast polypropylene (CPP) and cast polyethylene (CPE) films, with their excellent heat-sealing properties, transparency, and mechanical properties, have become core materials for automated high-speed packaging in industries such as food and pharmaceuticals. In high-speed packaging, the film needs to maintain a moderate and stable coefficient of friction of 0.25-0.5. This ensures sufficient friction with the equipment to prevent slippage while avoiding excessive friction that could lead to stretching, deformation, and downtime. This performance is primarily controlled through the blending of anti-stick and slip-resistant masterbatches. The core components of this masterbatch are inorganic particles and small-molecule amides. However, traditional technologies have inherent drawbacks: First, uncontrolled migration is difficult to control precisely due to the multi-factor influence of small-molecule amide migration. Initial rapid precipitation leads to an excessively low coefficient of friction, while insufficient reserves later cause the coefficient to rise, resulting in large performance fluctuations and a short optimal usage window. Second, uneven distribution occurs because the compatibility between the slip agent and the polymer matrix is ​​limited, leading to significant differences in the coefficient of friction in different areas of the film, affecting packaging consistency. Third, there is a contradiction between optical performance and functional durability. While increasing the amount of silica can improve anti-stick and slip resistance, it also increases haze and reduces transparency, making it difficult to meet the demands of high-end packaging. Existing industry improvements can only partially alleviate single defects, failing to address the core issue of uncontrollable small molecule migration, and may also lead to increased costs or processing problems. Therefore, this invention aims to overcome these shortcomings and provide a novel composite anti-stick and slip masterbatch. Through component synergy and structural design, the migration of slip agents is precisely controlled, resulting in a long-term stable and uniform coefficient of friction in the film with minimal impact on optical properties.

[0003] Chinese invention patent CN115477788B discloses the application of a compounded slip agent in an anti-sticking masterbatch, an anti-sticking masterbatch for polyolefin films, a preparation method, and the resulting film. This patent improves film haze and slip agent precipitation by compounding a specific low-migration phosphacyclohexene-based slip agent with migratory polysiloxane slip agents, combined with halloysite and other opening agents. However, it still has significant shortcomings: its core relies solely on optimizing the migration behavior through the ratio of two slip agents, without introducing a dedicated migration-regulating carrier and a physical anti-sticking synergistic system. The method fundamentally solves the core contradiction of uncontrollable small molecule migration, resulting in significant fluctuations in the coefficient of friction of the film after long-term storage, making it difficult to meet the stringent requirements of frictional stability for high-speed packaging. At the same time, its opening agent selection is limited and lacks synergistic design of particle size and structure. Although it can reduce initial haze, it still requires increasing the amount added to improve opening durability, which can easily lead to optical performance degradation. It fails to achieve a balance between functional durability and high transparency, and does not solve the problem of uneven distribution of slip agents in the film, making it impossible to completely avoid local slippage or jamming in high-speed packaging. Summary of the Invention

[0004] The first aspect of the present invention provides an anti-sticking and slip-resistant masterbatch for cast films, comprising, by weight percentage, 1-15% erucamide, 1-12% slip agent, 1-15% erucamide-modified silica, 1-12% anti-sticking agent, 0.1-3% additives, and carrier resin to make up the balance.

[0005] Optionally, by weight percentage, the components include 3-10% erucamide, 3-10% slip agent, 3-10% erucamide-modified silica, 3-10% anti-sticking agent, 0.1-1% additives, and carrier resin to make up the balance.

[0006] The slip agent includes at least one of saturated amides, bifunctional amides, and long-chain siloxanes.

[0007] In existing technologies, the migration of small-molecule amide-based slip agents is uncontrollable and unevenly distributed, and there is a lack of a dedicated migration control and physical anti-sticking synergistic system, resulting in large fluctuations in the coefficient of friction of cast films, while simultaneously making it difficult to balance optical performance and functional durability. The slip agent described in this invention includes at least one of saturated amides, bifunctional amides, and long-chain siloxanes. It enables cast films with the addition of this masterbatch to maintain excellent optical performance, while controlling the coefficient of friction to within 0.4 and with a fluctuation rate ≤20%, thus resolving the contradiction between unstable coefficient of friction and deterioration of optical performance in existing technologies: erucamide (unsaturated monoamide) has a moderate migration rate and can quickly form an initial lubricating layer on the film surface, while the slip agent (saturated amide, bifunctional amide, or long-chain siloxane) has a more gradual migration rate and can effectively replenish lubrication reserves for a long time.

[0008] Further research revealed that a mass ratio of erucamide to lubricant of (1-5):(1-5), especially at a near-equal ratio of 1:(0.5-2), achieved a dynamic balance in lubrication, avoiding the problems of excessive initial precipitation leading to a low coefficient of friction or insufficient later reserves causing a sharp increase in the coefficient of friction. Combined with porous silica with a high specific surface area (greater than 300 m² / g) and a specific particle size (D50 = 3-10 μm), it not only provides anti-sticking protection through physical isolation but also acts as a load carrier for the lubricant, allowing for precise adjustment. By controlling its migration rate and reducing local aggregation, a specific type and particle size (D50=3-10μm) of anti-sticking agent and erucamide-modified silica in a ratio of (1-5):(1-5) can synergistically optimize the internal structure of the film, suppress haze increase, ensure optical performance, and enhance the stability of the system. Combined with a specific preparation process, it can further promote the uniform dispersion of each component and improve the surface consistency of the film. Finally, through the lubrication synergy between the slip agents and the anti-sticking and optical performance synergy between erucamide-modified silica and anti-sticking agent, the system achieves the desired effect.

[0009] In this invention, erucamide-modified silica is grafted onto silica with a high specific surface area (>300m²) using a coupling agent. 2 A "core-shell" structure is formed on the porous silica surface (approximately 0.5 g / g): the physical adsorption of porous silica synergistically with the chemical grafting of erucamide. On the one hand, the porous structure adsorbs free slip molecules, slowing their migration rate to the film surface; on the other hand, some of the erucamide grafted onto the silica surface is retained inside the masterbatch during processing and slowly released during film use, forming a "reservoir-release" dynamic balance with the free slip. This "loaded slow-release" mechanism fundamentally solves the technical problem of uncontrollable migration of small molecule slip agents, achieving long-term stability of the friction coefficient.

[0010] Optionally, the number average molecular weight of the long-chain siloxane is 500-500,000.

[0011] Optionally, the saturated amides include at least one of stearamide, behenamide, palmitamide, and myristamide.

[0012] Optionally, the bifunctional amides include at least one of stearyl erucamide, ethylene bis-stearamide, ethylene bis-oleamide, ethylene bis-lauramide, ethylene bis-myristamide, ethylene bis-palmitamide, adipicoyl bis-stearamide, and sebacyl bis-stearamide.

[0013] The mass ratio of erucamide to slip agent is (1-5):(1-5).

[0014] Optionally, the mass ratio of erucamide to slip agent is 1:(0.5-2).

[0015] The carrier resin includes at least one of polypropylene and polyethylene.

[0016] Optionally, the polypropylene includes copolymer polypropylene and homopolymer polypropylene.

[0017] Optionally, the melt flow rate (GB / T3682-2018) of the copolymer polypropylene at 230°C and 2.16 kg is 5-15 g / 10 min.

[0018] Optionally, the polyethylene includes low-density polyethylene and linear low-density polyethylene.

[0019] Optionally, the polyethylene has a melt flow rate of 1-10 g / 10 min at 190°C and 2.16 kg.

[0020] The mass ratio of the erucamide-modified silica to the anti-sticking agent is (1-5):(1-5).

[0021] Optionally, the mass ratio of the erucamide-modified silica to the anti-sticking agent is 1:(0.5-2).

[0022] The erucic acid amide modified silica uses porous silica, which has a specific surface area greater than 300 m². 2 / g.

[0023] The porous silica has a D50 particle size of 3-10 μm.

[0024] The coupling agent used in the erucamide-modified silica is at least one selected from GPTMS (3-glycidyl etheroxypropyltrimethoxysilane), hexadecyltrimethoxysilane, 3-ureapropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, and triethoxysilylpropyl isocyanate.

[0025] The anti-sticking agent includes at least one of the following: artificial zeolite microspheres, glass microspheres, silica microspheres, calcium carbonate microspheres, organosilicon microspheres, polytetrafluoroethylene microspheres, polyimide microspheres, polyamide microspheres, polycarbonate microspheres, and polymethyl methacrylate microspheres.

[0026] Optionally, the anti-sticking agent has a D50 particle size of 3-10 μm.

[0027] The adjuvants include at least one of antioxidants and dispersants.

[0028] Optionally, the antioxidant includes at least one of antioxidant 1010, antioxidant 1076, antioxidant 1098, antioxidant 3114, antioxidant 168, and antioxidant 626.

[0029] Optionally, the dispersant includes at least one of polyethylene wax, polypropylene wax, oxidized polyethylene wax, and silicone dispersants.

[0030] The second aspect of the present invention provides a method for preparing an anti-sticking and slip-resistant masterbatch for cast films, comprising the following steps: feeding a carrier resin through a feed port A, feeding an anti-sticking agent through a feed port B, mixing erucamide, slip-resistant agent and additives and feeding them through a feed port C, feeding erucamide-modified silica through a feed port D, and then performing melt blending, extrusion, cooling and pelletizing in a twin-screw extruder to obtain the anti-sticking and slip-resistant masterbatch.

[0031] Optionally, when the carrier resin is polyethylene, the parameters of the twin-screw extruder include: zone 1 to zone 4 temperature: 160-190℃, zone 5 to die head temperature: 170-200℃.

[0032] Optionally, when the carrier resin is copolymer polypropylene, the parameters of the twin-screw extruder include: zone 1 to zone 4 temperature: 180-220℃, zone 5 to die head temperature: 200-250℃.

[0033] Beneficial effects 1. This invention limits the slip agent in the masterbatch to include at least one of saturated amides, bifunctional amides, and long-chain siloxanes. This allows the cast film with the masterbatch to maintain excellent optical properties, while controlling the coefficient of friction to within 0.4 and the fluctuation rate to ≤20%, thus resolving the contradiction between unstable coefficient of friction and deteriorated optical properties in the prior art.

[0034] 2. By limiting the mass ratio of erucamide to slip agent in the masterbatch to (1-5):(1-5), the present invention can further improve the stability of the friction coefficient and make the fluctuation rate of the friction coefficient ≤10%.

[0035] 3. By limiting the specific anti-sticking agent in the masterbatch, the present invention can further improve the optical properties of the cast film with the masterbatch added, so that the haze is ≤5%.

[0036] 4. The present invention improves the uniformity of the surface friction coefficient of the cast film with the added masterbatch through a specific masterbatch preparation method.

[0037] 5. The masterbatch prepared by this invention can meet the application requirements of CPP and CPE films.

[0038] 6. This invention achieves long-term stability of the friction coefficient of the cast film (fluctuation rate ≤10%) through a "load-release" mechanism and multi-component synergy, which is superior to the prior art (the fluctuation rate of the CN115477788B embodiment is about 15-20%), while maintaining haze ≤5%. It has significant technological advancement and industrial application value in the field of high-speed packaging. Detailed Implementation Example 1 A non-sticking and slip-retaining masterbatch for cast films, by weight percentage, comprises 6% erucamide, 5% slip agent, 6% erucamide-modified silica, 4% non-sticking agent (organosilicon microspheres, D50 particle size = 8.0 μm, Shin-Etsu Chemical, KMP-595), 0.5% additives, and a carrier resin (copolymer polypropylene, melt flow rate of 8 g / 10 min at 230℃ and 2.16 kg, purchased from Shanghai Petrochemical, F08E) to make up the balance. The additives are: 0.3 wt% antioxidant 1010 and 0.2 wt% polyethylene wax (Yangzi Petrochemical, PEH-5780D). The slip agent is: 2 wt% ethylene bis-stearamide (Korean Kyungshin Corporation, HI-LUBE) and 3 wt% stearamide (Crodamide-SR).

[0039] The erucamide-modified silica is prepared by the following steps: 1. Pretreatment of silica: Take 10 kg of silica and vacuum dry it at 120°C for 2 hours. After taking it out, immediately place it in a desiccator to cool to room temperature.

[0040] 2. GPTMS pre-hydrolysis: Add 2 L of anhydrous ethanol and 0.1 L of deionized water to reactor A, adjust the pH to 5.0 with glacial acetic acid, add 2 L of 3-glycidyl etheroxypropyltrimethoxysilane (GPTMS), and stir for 15 minutes for pre-hydrolysis (the solution should be clear at this time).

[0041] 3. Silanization reaction: Add the dried silica to reaction vessel A, add 5 L of anhydrous ethanol, stir and disperse evenly, and slowly add the pre-hydrolyzed GPTMS solution to the reaction system at room temperature. After the addition is complete, heat to 80℃ and reflux for 6-8 hours.

[0042] 4. Post-treatment: Cool the reaction solution to room temperature and filter (or centrifuge) using a Buchner funnel to obtain a filter cake. Wash the filter cake four times with 2 L of anhydrous ethanol (0.5 L each time), drying after each wash to ensure the removal of unreacted GPTMS. The filter cake has an ethanol content of approximately 5-10% and can be used directly in the second step (no drying required).

[0043] 5. Dissolving erucamide: Add 3 L of anhydrous ethanol to reaction vessel B, heat to 50-60℃, add 2 kg of erucamide, and stir until completely dissolved (the solution is pale yellow and transparent).

[0044] 6. Add pretreated silica: Add the filter cake obtained in step 4 (about 10-11 kg, containing a small amount of ethanol) directly to reactor B, and add anhydrous ethanol to bring the total liquid volume to about 15 L (to ensure that the material can be stirred). After stirring evenly, take a sample to measure the pH (it should be neutral; if it is acidic, add triethylamine to adjust it to pH 7.0±0.5).

[0045] 7. Grafting reaction: Heat the reactor B to 70-75℃ (reflux temperature) and stir for 12-16 hours. During the reaction, TGA samples can be taken to monitor the grafting rate.

[0046] 8. Post-treatment: After cooling the reaction solution to room temperature, filter or centrifuge to separate the solid. Wash the solid sequentially with: hot ethanol (50-60℃) three times (2L each time); deionized water twice (2L each time); and ethanol once (2L). Dry the solid after each wash until no obvious residue remains after evaporation. After drying, spread the solid evenly on a tray and vacuum dry at 50℃ for 8-12 hours to constant weight. Pulverize and sieve (200 mesh) to obtain erucamide-grafted modified silica.

[0047] A method for preparing an anti-sticking and slip-resistant masterbatch for cast films comprises the following steps: a carrier resin is fed through feed port A; an anti-sticking agent is fed through feed port B; erucamide, slip-resistant agent, and additives are mixed and fed through feed port C; erucamide-modified silica is fed through feed port D; the mixture is then melt-blended, extruded, cooled, and pelletized using a twin-screw extruder to obtain the anti-sticking and slip-resistant masterbatch. The parameters of the twin-screw extruder are: zone 1 to 4 temperatures: 180-220℃; zone 5 to die head temperature: 200-250℃.

[0048] Example 2 The specific implementation method of the erucic acid amide modified silica in a cast film anti-sticking and slip masterbatch is the same as in Example 1; the difference is that the cast film anti-sticking and slip masterbatch, by weight percentage, is 5% erucic acid amide, 6% slip agent (stearyl erucic acid amide, Nantong Dongli Technology), 6% erucic acid amide modified silica, 4% anti-sticking agent (glass microspheres, D50 particle size = 6.0 μm, Toshiba Synthetic, Japan, model Tospearl120), 0.5% additives, and the balance is made up by carrier resin (linear low-density polyethylene, Daqing Petrochemical, 7042). The additives are: 0.3 wt% antioxidant 1010 and 0.2 wt% polyethylene wax (Yangzi Petrochemical, PEH-5780D).

[0049] The parameters of the twin-screw extruder are as follows: zone 1 to zone 4 temperature: 160-190℃, zone 5 to die head temperature: 170-200℃.

[0050] Example 3 The specific implementation method of the erucic acid amide-modified silica in an anti-sticking and slip-resistant masterbatch for cast films is the same as in Example 1; the difference is that the anti-sticking and slip-resistant masterbatch for cast films, by weight percentage, consists of 6% erucic acid amide, 5% slip agent (long-chain siloxane, number average molecular weight 20000), 6% erucic acid amide-modified silica, 4% anti-sticking agent (organosilicon microspheres), 0.5% additives, and the balance is made up with carrier resin (copolymer polypropylene). The preparation method is the same as in Example 1.

[0051] Comparative Example 1 The specific implementation method is the same as in Example 1; the difference is that no anti-sticking agent is added in Comparative Example 1.

[0052] Comparative Example 2 The specific implementation method is the same as in Example 1; the difference is that in Comparative Example 2, the slip agent is replaced with an equal amount of erucamide.

[0053] Comparative Example 3 The specific implementation method is the same as in Example 1; the difference is that the content of erucamide in Comparative Example 3 is 1%, and the content of slip agent is 10%. The slip agent is: 4 wt% ethylene bis-stearamide (Kyungshin Corporation, Korea, HI-LUBE) and 6 wt% stearamide (Crodamide-SR).

[0054] Comparative Example 4 The specific implementation method is the same as in Example 1; the difference is that in Comparative Example 4, 9% of erucic acid amide modified silica and 1% of anti-sticking agent (organosilicon microspheres, D50 particle size = 8.0 μm, Shin-Etsu Chemical, KMP-595) were used. Comparative Example 5 The specific implementation method is the same as in Example 1; the difference is that in Comparative Example 5, the silica modification only involves steps 1-4.

[0055] Comparative Example 6 The specific implementation method is the same as in Example 1; the difference is that the silicon dioxide in Comparative Example 6 is not modified.

[0056] Performance testing methods and data The masterbatches prepared in Example 1 and the comparative example were mixed with copolymer polypropylene base material (Shanghai Petrochemical, grade F08E) at an addition amount of 1.5 wt%, and cast into films with a thickness of 40 μm. The masterbatch prepared in Example 2 was mixed with linear low-density polyethylene base material (Daqing Petrochemical, grade 7042) at an addition amount of 1.5 wt%, and cast into films with a thickness of 40 μm. The above films were tested as follows, and the test data are listed in Table 1. The coefficient of friction was determined according to GB / T10006-2021 (Determination of coefficient of friction of plastics, films and sheets), and the coefficient of friction fluctuation rate was calculated as (initial dynamic coefficient of friction - dynamic coefficient of friction after curing) / initial dynamic coefficient of friction × 100%. The haze was determined according to GB / T2410-2008.

[0057] The surface smoothness and uniformity (tactile evaluation) were assessed using a combination of subjective evaluation and objective quantification. The specific testing steps are as follows: The evaluators consist of 8 professionally trained evaluators (half male and half female, aged 25-45). All personnel undergo standardized operational training before the test to ensure consistency in evaluation criteria.

[0058] Test environment: temperature (23±2)℃, relative humidity (50±5)%, the sample was placed in the test environment for more than 24 hours.

[0059] Operating method: Each evaluator uses a clean palm to touch the surface of the film in one direction (3 times each in the longitudinal and transverse directions) at a constant speed (about 5 cm / s) and pressure (about 2 N). The evaluator scores the film based on the smoothness (resistance level) and uniformity (whether there is a feeling of resistance or roughness) of the touch.

[0060] Scoring criteria: A 5-point scale is used, as detailed below: 4-5 points: The surface is extremely smooth, with a uniform feel and no resistance. 3-4 points: The surface is smooth and the feel is uniform, with occasional slight resistance; 2-3 points: The surface is relatively smooth, the feel is basically uniform, and there is a noticeable resistance. 1-2 points: The surface is not smooth, the feel is uneven, and there is obvious resistance. 0-1 points: The surface is rough, the feel is extremely uneven, and there is a severe sense of resistance.

[0061] Final result: The highest and lowest scores were removed, and the arithmetic mean of the remaining 6 scores was taken, rounded to one decimal place, as the final tactile evaluation value for the sample. For example, the tactile evaluation value for Example 1 was 4.9 points.

[0062] Table 1

[0063] As shown in Table 1, the initial dynamic friction coefficients of Examples 1-3 were all controlled within 0.33, with a fluctuation rate ≤10%, haze ≤4.4%, and a hand feel score ≥4.0 after curing. This indicates that under different carrier resins (copolymer polypropylene, linear low-density polyethylene) and different types of slip agents (bifunctional amides, saturated amides, long-chain siloxanes), the technical solution of this invention can achieve a comprehensive effect of stable friction coefficient, excellent optical properties, and uniform surface smoothness, proving the decisive contribution of specific formulations and preparation methods to stability.

[0064] Comparative Example 1 (without anti-sticking agent) had an initial friction coefficient as high as 0.55. Although it decreased to 0.38 after curing, the fluctuation rate was 31%, and the haze was only 1.9% (due to the lack of anti-sticking particles, the light transmittance was good but the anti-sticking effect was insufficient). This indicates that the lack of anti-sticking agent caused severe initial adhesion of the film, which could not meet the requirements of high-speed packaging.

[0065] Comparative Example 2 (single erucamide replacing composite slip agent) had an initial friction coefficient of 0.30, which was acceptable, but the difference in lateral friction coefficient reached 0.25, and the surface uniformity was extremely poor (hand feel score of 0.9). After curing, the friction coefficient dropped sharply to 0.16, with a fluctuation rate as high as 47%, proving that the migration of single erucamide was uncontrollable and could not achieve a long-term stable lubrication effect.

[0066] Comparative Example 3 (imbalanced ratio of erucamide to slip agent, 1:10) had a high initial coefficient of friction (0.73), which remained as high as 0.54 after curing. Although the fluctuation rate was 26%, it was still higher than that of the Example, and the lateral difference was large (0.11~0.17). The feel score was only 2.1, which exceeded the ideal range of 0.25-0.5 required for high-speed packaging. This indicates that the excessive proportion of slip agent failed to effectively and quickly migrate to the surface to form a uniform lubricating layer. This shows that the mass ratio of erucamide to slip agent needs to be maintained in the range of (1-5):(1-5). Deviating from this ratio will lead to insufficient or excessive lubrication effect, and the dynamic balance between initial and long-term lubrication cannot be achieved.

[0067] Comparative Example 4 (the ratio of erucamide-modified silica to anti-stick agent was unbalanced, 9:1) showed a significant increase in haze to 3.8%, a large difference in the transverse friction coefficient (0.16~0.20), and a fluctuation rate of 26%. This indicates that when the proportion of anti-stick agent is too low, the optical performance deteriorates and the surface uniformity decreases, verifying that the mass ratio of the two should be maintained within the range of (1-5):(1-5).

[0068] Comparative Example 5 (silica modified only by silanization, without grafting erucamide) had an initial friction coefficient of 0.47, which decreased to 0.28 after aging, with a fluctuation rate of 38%. This indicates that silica lacking erucamide grafting cannot effectively control the migration of slip agents, resulting in insufficient initial precipitation and excessively rapid migration in the later stages, with stability significantly inferior to the examples.

[0069] Comparative Example 6 (unmodified silica) had an initial friction coefficient of 0.49, which decreased to 0.33 after curing, with a fluctuation rate of 33% and a feel score of only 1.8. This indicates that the unmodified silica has poor compatibility with the matrix and slip agent, and cannot play a synergistic role in migration regulation and anti-sticking, resulting in the worst overall performance.

Claims

1. A non-stick, slip-resistant masterbatch for cast films, characterized in that, By weight percentage, the components include: 1-15% erucamide, 1-12% slip agent, 1-15% erucamide-modified silica, 1-12% anti-sticking agent, 0.1-3% additives, and carrier resin to make up the balance; the slip agent includes at least one of saturated amides, bifunctional amides, and long-chain siloxanes; the erucamide-modified silica is obtained by grafting erucamide onto porous silica after surface treatment with a coupling agent, and the specific surface area of ​​the porous silica is greater than 300 m². 2 / g, D50 particle size is 3-10μm; The anti-sticking agent comprises at least one of the following: artificial zeolite microspheres, glass microspheres, silica microspheres, calcium carbonate microspheres, organosilicon microspheres, polytetrafluoroethylene microspheres, polyimide microspheres, polyamide microspheres, polycarbonate microspheres, and polymethyl methacrylate microspheres; the D50 particle size of the anti-sticking agent is 3-10 μm. The mass ratio of erucamide to slip agent is (1-5):(1-5); The mass ratio of the erucamide-modified silica to the anti-sticking agent is (1-5):(1-5); The carrier resin includes at least one of copolymer polypropylene and polyethylene.

2. The anti-stick and slip-resistant masterbatch according to claim 1, characterized in that, By weight percentage, the components include: 3-10% erucamide, 3-10% slip agent, 3-10% erucamide-modified silica, 3-10% anti-sticking agent, 0.1-1% additives, and carrier resin to make up the balance.

3. The anti-sticking and slip-resistant masterbatch according to claim 1, characterized in that, The mass ratio of erucamide to slip agent is 1:(0.5-2).

4. The anti-stick and slip-resistant masterbatch according to claim 1 or 2, characterized in that, The coupling agent used in the erucamide-modified silica is at least one of 3-glycidyl etheroxypropyltrimethoxysilane and 3-mercaptopropyltrimethoxysilane.

5. A method for preparing the anti-stick and slip-resistant masterbatch according to any one of claims 1-4, characterized in that, Includes the following steps: The carrier resin is fed through the A feed port, the anti-sticking agent is fed through the B feed port, the erucamide, slip agent and additives are mixed and fed through the C feed port, and the erucamide-modified silica is fed through the D feed port. The mixture is then melt-blended, extruded, cooled and pelletized in a twin-screw extruder to obtain the anti-sticking and slip masterbatch.

6. The preparation method according to claim 5, characterized in that, The carrier resin is polyethylene, and the parameters of the twin-screw extruder include: zone 1 to 4 temperature: 160-190℃, zone 5 to die head temperature: 170-200℃; when the carrier resin is copolymer polypropylene, the parameters of the twin-screw extruder include: zone 1 to 4 temperature: 180-220℃, zone 5 to die head temperature: 200-250℃.

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