Preparation method of high-sealing chemical-resistant PP-ABS-K (polypropylene-acrylonitrile-butadiene-styrene-K) glue composite injection molding perfume bottle cap

Abstract

The invention discloses a preparation method of a high-sealing chemical-resistant PP-ABS-K glue composite injection molding perfume bottle cap, and relates to the field of application of plastic materials. The perfume bottle cap is prepared by compounding PP, ABS and K glue according to a specific ratio and adopting an injection molding process. The bottle cap has excellent sealing performance, chemical corrosion resistance and high strength, erosion of perfume components to the bottle cap can be effectively prevented, and the long-time sealing effect is kept. Through optimized process parameters, the bottle cap is excellent in sealing performance, mechanical strength and ultraviolet resistance, and can meet the requirements of modern perfume packaging for high-performance materials. The preparation method of the perfume bottle cap is simple, convenient, economical and excellent in performance, and has a wide application prospect.

Description

Technical Field

[0001] This invention relates to the application of plastic materials, and in particular to a method for preparing a highly sealing and chemically resistant PP-ABS-K adhesive composite injection molded perfume bottle cap. Background Technology

[0002] As a crucial component of perfume packaging, the perfume bottle cap's sealing performance, chemical resistance, and mechanical strength directly impact the quality and market competitiveness of the perfume product. With increasingly diverse consumer demands for perfumes and rising requirements for packaging quality, the performance requirements for perfume bottle cap materials are also gradually increasing. Traditional perfume bottle caps are generally made of a single material (such as PP or ABS), whose main advantages are ease of molding and low cost. However, these materials are prone to swelling, aging, or chemical corrosion when exposed to perfume components (such as alcohol and fragrances), leading to decreased sealing performance or breakage, affecting the long-term storage and user experience of the perfume.

[0003] Polypropylene (PP) and acrylonitrile-butadiene-styrene copolymer (ABS) are two common materials used in perfume bottle caps. PP has good moldability, chemical stability, and heat resistance, but it is prone to expansion and deformation when in prolonged contact with alcohol-based substances, leading to a decrease in the cap's seal. ABS, on the other hand, possesses good mechanical strength and impact resistance, but its resistance to the corrosion of perfume ingredients is poor, especially when exposed to solvents such as alcohol, causing performance degradation. Therefore, caps made of a single material cannot meet the requirements of both high sealing performance and chemical resistance in practical applications.

[0004] To overcome these problems, researchers have attempted to improve the overall performance of bottle caps through composite materials. For example, using a mixture of PP and ABS can improve the impact resistance and strength of bottle caps, but it still faces the problem of insufficient chemical resistance. In recent years, the application of K-resin has provided a new direction for the development of composite materials. K-resin can significantly improve the chemical resistance and sealing properties of polyolefins, and is especially suitable for environments that come into contact with chemicals such as alcohol and fragrances.

[0005] Currently, the perfume bottle cap industry still faces challenges in material selection and optimization, especially in meeting the multiple requirements of high sealing performance, chemical resistance, and high strength. Although some research has explored the application of composite materials, most existing technologies still have the following shortcomings: Insufficient sealing and corrosion resistance: Although existing composite materials have improved the strength of the bottle cap, it is still difficult to achieve stable sealing and corrosion resistance when in contact with perfume ingredients for a long time.

[0006] Complex production processes: The production processes of some composite materials are quite complex, requiring specific equipment and high process requirements, which increases production costs.

[0007] Therefore, developing a new composite material system that can simultaneously achieve the sealing performance, chemical resistance, impact resistance, and mechanical strength of perfume bottle caps has become an important goal of current technological development. Summary of the Invention

[0008] To overcome the shortcomings of existing technologies, this invention provides a method for preparing a highly sealing and chemically resistant PP-ABS-K adhesive composite injection-molded perfume bottle cap. The highly sealing and chemically resistant perfume bottle cap is prepared by injection molding using composite PP, ABS, and K adhesive materials.

[0009] The specific plan is as follows: A method for preparing a highly sealing and chemically resistant PP-ABS-K adhesive composite injection molded perfume bottle cap includes the following steps: Step 1: Weigh out PP, ABS, carboxylated styrene-butadiene rubber, amino-terminated hyperbranched polyamide, and 8-hydroxyquinoline nickel in a mass ratio of 40-60:30-40:10-15:0.3-0.6:0.002-0.02, add them to a high-speed mixer, heat to 90-110℃, and stir for 5-8 minutes; add 0.08-0.2 parts of tetrabutyl titanate catalyst, and continue stirring for 4-10 minutes to ensure uniform dispersion of the catalyst; Step 2: Add antioxidant (0.1-1% by mass), UV absorber (0.1-1% by mass), and heat stabilizer (0.1-0.5% by mass) to the mixed materials, and continue stirring until the total mixing time reaches 15-30 minutes. Step 3: Plasticize the mixture using a twin-screw extruder until it is fully mixed and homogeneous; Step 4: Cool the plasticized compound, granulate it, and then send it into the injection molding machine; Step 5: Use an injection molding machine to inject the granular material into the perfume bottle cap mold. The injection temperature is 220-240℃ and the injection pressure is 600-1000 bar. Step 6: After injection molding and cooling to room temperature, demold to obtain the final bottle cap product.

[0010] Preferably, the terminal amino hyperbranched polyamide has a concentration of 1900-2200 g / mol.

[0011] Preferably, the antioxidant is selected from 1080 or 1010.

[0012] Preferably, the ultraviolet absorber is selected from UV-531, Tinuvin 328, or UV-P.

[0013] Preferably, the heat stabilizer is selected from heat stabilizer 264.

[0014] Preferably, the plasticizing temperature of the twin-screw extruder is set to 200-230℃, and the speed is set to 200-400rpm.

[0015] Preferably, the injection time of the injection molding machine is 5-10 seconds and the cooling time is 30-60 seconds.

[0016] Preferably, the temperature of the injection mold is 30-50℃.

[0017] Reaction mechanism The carboxyl functional groups on the carboxyl styrene-butadiene rubber molecular chain undergo a highly efficient amidation reaction with the amino groups in the amino-terminated hyperbranched polyamide (molecular weight 1900-2200 g / mol). Simultaneously, under the catalysis of tetrabutyl titanate catalyst, the carboxyl groups further undergo esterification with the hydroxyl groups in the system, forming a three-dimensional network structure with controllable crosslinking. 8-hydroxyquinoline nickel forms a stable complex with the above reaction products through coordination, which can not only regulate the reaction kinetics but also optimize the interaction between molecular chains, significantly improving the interfacial compatibility, structural compactness, and stability of PP-ABS-K rubber composite materials, providing core structural support for the realization of the material's excellent performance.

[0018] Technical effect 1. Significantly improved sealing performance: Carboxylated styrene-butadiene rubber, amino-terminated hyperbranched polyamide, and 8-hydroxyquinoline nickel construct a dense cross-linked network through esterification, amidation, and coordination reactions. Combined with the synergistic effect of PP-ABS-K adhesive, the risk of gas permeation is greatly reduced, ensuring the sealing stability of perfumes during long-term storage.

[0019] 2. Excellent chemical corrosion resistance: The cross-linked network structure effectively blocks the erosion of perfume ingredients (such as alcohol and fragrance), while the K glue enhances the material's resistance to swelling and aging, extending the life of the bottle cap.

[0020] 3. Combining mechanical strength and stability: The composite system of PP and ABS lays a good foundation for mechanical strength, and the cross-linking reaction further optimizes the intermolecular bonding force, making the bottle cap less prone to deformation and breakage during use, while taking into account both structural stability and impact resistance. Detailed Implementation

[0021] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the invention.

[0022] Where specific techniques or conditions are not specified in the examples, they shall be performed in accordance with the techniques or conditions described in the literature in this field, or in accordance with the product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased through legitimate channels.

[0023] The testing method involved in this invention is as follows: 1. Air tightness test Use an air tightness tester to detect the sealing performance of the perfume bottle cap. The test process is as follows: Install the cap onto a standard perfume bottle body, ensuring that the cap is in complete and tight contact with the bottle mouth. Use the air tightness tester to measure the pressure change inside the bottle body after the cap is sealed. Set the pressure inside the bottle body to 0.1 MPa and maintain it for 24 hours to detect whether there is gas leakage. Taking the gas leakage amount as the standard, a leakage amount ≤ 0.1 MPa / 24 hours is considered qualified.

[0024] 2. Chemical resistance test Immerse the cap in an environment containing a 10% alcohol solution. The immersion time is 72 hours, and then check the physical appearance (such as cracks, color change, swelling) and sealing performance of the cap. If there is no obvious chemical corrosion, swelling or surface damage to the cap, it is considered qualified in terms of chemical resistance.

[0025] 3. Anti-ultraviolet test Use an ultraviolet accelerated aging test machine to conduct ultraviolet radiation aging test on the cap. The test process is as follows: Place the cap sample in an ultraviolet accelerated aging chamber, set the radiation intensity to 0.85 W / m²·nm, and the radiation wavelength range to 300 - 400 nm. After continuous radiation for 72 hours, detect the appearance changes of the cap, such as color change, cracking or embrittlement. Detect the changes in the ultraviolet absorption rate and surface hardness of the cap. Examples

[0026] A preparation method of a highly sealed and chemically resistant PP-ABS-K glue composite injection-molded perfume bottle cap, comprising the following steps: 1. First step: Weigh 40 kg of PP, 30 kg of ABS, 10 kg of carboxylated styrene-butadiene rubber, 0.3 kg of terminal amino hyperbranched polyamide, and 0.002 kg of nickel 8-hydroxyquinoline according to a mass ratio of 40:30:10:0.3:0.002, and add them to a high-speed mixer; heat up to 90 °C and stir for 5 minutes; add 0.08 kg of tetrabutyl titanate catalyst and continue to stir for 4 minutes to ensure uniform dispersion of the catalyst; 2. Second step: Add an antioxidant (mass ratio of 0.1%, calculated based on the total mass of the materials in the first step, that is, 0.803 kg), an ultraviolet absorber (mass ratio of 0.1%, that is, 0.803 kg), and a heat stabilizer (mass ratio of 0.1%, that is, 0.803 kg) to the mixed materials; continue to stir until the total mixing time reaches 15 minutes; among them, the antioxidant is selected from 1080, the ultraviolet absorber is selected from UV-531, and the heat stabilizer is selected from heat stabilizer 264; the molecular weight of the terminal amino hyperbranched polyamide is 1900 g / mol; 3. Third step: Plasticize the mixture through a twin-screw extruder until it is fully mixed and homogeneous; set the plasticizing temperature of the twin-screw extruder to 200℃ and the speed to 200rpm; 4. Fourth step: Cool the plasticized compound, granulate it, and then send it into the injection molding machine; 5. Step 5: Use an injection molding machine to inject the granular material into the perfume bottle cap mold; the injection temperature is 220℃, the injection pressure is 600 bar, the injection time is 5 seconds; the injection mold temperature is 30℃. 6. Step Six: After injection molding, cool to room temperature for 30 seconds, then demold to obtain the final bottle cap product. Example

[0027] A method for preparing a highly sealing and chemically resistant PP-ABS-K adhesive composite injection molded perfume bottle cap includes the following steps: Step 1: Weigh 45kg of PP, 33kg of ABS, 12kg of carboxylated styrene-butadiene rubber, 0.4kg of amino-terminated hyperbranched polyamide, and 0.008kg of 8-hydroxyquinoline nickel according to a mass ratio of 45:33:12:0.4:0.008, and add them to a high-speed mixer; heat to 95℃ and stir for 6 minutes; add 0.12kg of tetrabutyl titanate catalyst and continue stirring for 6 minutes to ensure uniform dispersion of the catalyst; 2. Second step: Add antioxidant (0.3% by mass, calculated based on the total mass of materials from the first step, i.e., 0.904 kg), UV absorber (0.3% by mass, i.e., 0.904 kg), and heat stabilizer (0.2% by mass, i.e., 0.603 kg) to the mixed materials; continue stirring until the total mixing time reaches 20 minutes; wherein, the antioxidant is selected from 1080, the UV absorber is selected from Tinuvin 328, and the heat stabilizer is selected from heat stabilizer 264; the molecular weight of the terminal amino hyperbranched polyamide is 2000 g / mol; 3. Third step: Plasticize the mixture using a twin-screw extruder until it is fully mixed and homogeneous; set the plasticizing temperature of the twin-screw extruder to 210℃ and the speed to 250rpm. 4. Fourth step: Cool the plasticized compound, granulate it, and then send it into the injection molding machine; 5. Step 5: Use an injection molding machine to inject the granular material into the perfume bottle cap mold; the injection temperature is 225℃, the injection pressure is 750 bar, the injection time is 7 seconds; the injection mold temperature is 35℃. 6. Step Six: After injection molding, cool to room temperature for 40 seconds, then demold to obtain the final bottle cap product. Example

[0028] A method for preparing a highly sealing and chemically resistant PP-ABS-K adhesive composite injection molded perfume bottle cap includes the following steps: Step 1: Weigh 55kg of PP, 37kg of ABS, 14kg of carboxylated styrene-butadiene rubber, 0.5kg of amino-terminated hyperbranched polyamide, and 0.015kg of 8-hydroxyquinoline nickel according to a mass ratio of 55:37:14:0.5:0.015, and add them to a high-speed mixer; heat to 105℃ and stir for 7 minutes; add 0.16kg of tetrabutyl titanate catalyst and continue stirring for 8 minutes to ensure uniform dispersion of the catalyst; 2. Second step: Add antioxidant (0.7% by mass, calculated based on the total mass of materials from the first step, i.e., 1.065 kg), UV absorber (0.7% by mass, i.e., 1.065 kg), and heat stabilizer (0.4% by mass, i.e., 0.603 kg) to the mixed materials; continue stirring until the total mixing time reaches 25 minutes; wherein, the antioxidant is selected from 1010, the UV absorber is selected from a mixture of UV-531 and UV-P (mass ratio 1:1), and the heat stabilizer is selected from heat stabilizer 264; the molecular weight of the terminal amino hyperbranched polyamide is 2100 g / mol; 3. Third step: Plasticize the mixture using a twin-screw extruder until it is fully mixed and homogeneous; set the plasticizing temperature of the twin-screw extruder to 220℃ and the speed to 350rpm. 4. Fourth step: Cool the plasticized compound, granulate it, and then send it into the injection molding machine; 5. Step 5: Use an injection molding machine to inject the granular material into the perfume bottle cap mold; the injection temperature is 235℃, the injection pressure is 900 bar, the injection time is 8 seconds; the injection mold temperature is 45℃. 6. Step Six: After injection molding, cool to room temperature for 50 seconds, then demold to obtain the final bottle cap product. Example

[0029] A method for preparing a highly sealing and chemically resistant PP-ABS-K adhesive composite injection molded perfume bottle cap includes the following steps: Step 1: Weigh 60kg of PP, 40kg of ABS, 15kg of carboxylated styrene-butadiene rubber, 0.6kg of amino-terminated hyperbranched polyamide, and 0.02kg of 8-hydroxyquinoline nickel according to a mass ratio of 60:40:15:0.6:0.02, and add them to a high-speed mixer; heat to 110℃ and stir for 8 minutes; add 0.2kg of tetrabutyl titanate catalyst and continue stirring for 10 minutes to ensure uniform dispersion of the catalyst; 2. Second step: Add antioxidant (1% by mass, calculated based on the total mass of materials from step one, i.e., 1.156 kg), UV absorber (1% by mass, i.e., 1.156 kg), and heat stabilizer (0.5% by mass, i.e., 0.578 kg) to the mixed materials; continue stirring until the total mixing time reaches 30 minutes; wherein, the antioxidant is selected from 1010, the UV absorber is selected from a mixture of Tinuvin 328 and UV-P (mass ratio 2:1), and the heat stabilizer is selected from heat stabilizer 264; the molecular weight of the terminal amino hyperbranched polyamide is 2200 g / mol; 3. Third step: Plasticize the mixture through a twin-screw extruder until it is fully mixed and homogeneous; set the plasticizing temperature of the twin-screw extruder to 230℃ and the speed to 400rpm; 4. Fourth step: Cool the plasticized compound, granulate it, and then send it into the injection molding machine; 5. Step 5: Use an injection molding machine to inject the granular material into the perfume bottle cap mold; the injection temperature is 240℃, the injection pressure is 1000 bar, the injection time is 10 seconds; the injection mold temperature is 50℃. 6. Step Six: After injection molding, cool to room temperature for 60 seconds, then demold to obtain the final bottle cap product.

[0030] Comparative Example 1 A method for preparing a highly sealing and chemically resistant PP-ABS-K adhesive composite injection molded perfume bottle cap includes the following steps: Step 1: Weigh 40kg of PP, 30kg of ABS, 0.3kg of amino-terminated hyperbranched polyamide, and 0.002kg of 8-hydroxyquinoline nickel according to a mass ratio of 40:30:0.3:0.002, and add them to a high-speed mixer; heat to 90℃ and stir for 5 minutes; add 0.08kg of tetrabutyl titanate catalyst and continue stirring for 4 minutes to ensure uniform dispersion of the catalyst; 2. Second step: Add antioxidant (0.1% by mass, calculated based on the total mass of materials from step one, i.e., 0.803 kg), ultraviolet absorber (0.1% by mass, i.e., 0.803 kg), and heat stabilizer (0.1% by mass, i.e., 0.803 kg) to the mixed materials; continue stirring until the total mixing time reaches 15 minutes; wherein, the antioxidant is selected from 1080, the ultraviolet absorber is selected from UV-531, and the heat stabilizer is selected from heat stabilizer 264; the molecular weight of the terminal amino hyperbranched polyamide is 1900 g / mol; 3. Third step: Plasticize the mixture through a twin-screw extruder until it is fully mixed and homogeneous; set the plasticizing temperature of the twin-screw extruder to 200℃ and the speed to 200rpm; 4. Fourth step: Cool the plasticized compound, granulate it, and then send it into the injection molding machine; 5. Step 5: Use an injection molding machine to inject the granular material into the perfume bottle cap mold; the injection temperature is 220℃, the injection pressure is 600 bar, the injection time is 5 seconds; the injection mold temperature is 30℃. 6. Step Six: After injection molding, cool to room temperature for 30 seconds, then demold to obtain the final bottle cap product.

[0031] Comparative Example 2 A method for preparing a highly sealing and chemically resistant PP-ABS-K adhesive composite injection molded perfume bottle cap includes the following steps: Step 1: Weigh 40kg of PP, 30kg of ABS, 10kg of carboxylated styrene-butadiene rubber, and 0.002kg of 8-hydroxyquinoline nickel according to a mass ratio of 40:30:10:0.002, and add them to a high-speed mixer; heat to 90℃ and stir for 5 minutes; add 0.08kg of tetrabutyl titanate catalyst and continue stirring for 4 minutes to ensure uniform dispersion of the catalyst; 2. Second step: Add antioxidant (0.1% by mass, calculated based on the total mass of materials from step one, i.e., 0.803 kg), ultraviolet absorber (0.1% by mass, i.e., 0.803 kg), and heat stabilizer (0.1% by mass, i.e., 0.803 kg) to the mixed materials; continue stirring until the total mixing time reaches 15 minutes; wherein, the antioxidant is selected from 1080, the ultraviolet absorber is selected from UV-531, and the heat stabilizer is selected from heat stabilizer 264; the molecular weight of the terminal amino hyperbranched polyamide is 1900 g / mol; 3. Third step: Plasticize the mixture using a twin-screw extruder until it is fully mixed and homogeneous; set the plasticizing temperature of the twin-screw extruder to 200℃ and the speed to 200rpm. 4. Fourth step: Cool the plasticized compound, granulate it, and then send it into the injection molding machine; 5. Step 5: Use an injection molding machine to inject the granular material into the perfume bottle cap mold; the injection temperature is 220℃, the injection pressure is 600 bar, the injection time is 5 seconds; the injection mold temperature is 30℃. 6. Step Six: After injection molding, cool to room temperature for 30 seconds, then demold to obtain the final bottle cap product.

[0032] Comparative Example 3 A method for preparing a highly sealing and chemically resistant PP-ABS-K adhesive composite injection molded perfume bottle cap includes the following steps: 1. Step 1: Weigh 40kg of PP, 30kg of ABS, 10kg of carboxylated styrene-butadiene rubber, and 0.3kg of amino-terminated hyperbranched polyamide in a mass ratio of 40:30:10:0.3, and add them to a high-speed mixer; heat to 90℃ and stir for 5 minutes; add 0.08kg of tetrabutyl titanate catalyst and continue stirring for 4 minutes to ensure uniform dispersion of the catalyst; 2. Second step: Add antioxidant (0.1% by mass, calculated based on the total mass of materials from step one, i.e., 0.803 kg), ultraviolet absorber (0.1% by mass, i.e., 0.803 kg), and heat stabilizer (0.1% by mass, i.e., 0.803 kg) to the mixed materials; continue stirring until the total mixing time reaches 15 minutes; wherein, the antioxidant is selected from 1080, the ultraviolet absorber is selected from UV-531, and the heat stabilizer is selected from heat stabilizer 264; the molecular weight of the terminal amino hyperbranched polyamide is 1900 g / mol; 3. Third step: Plasticize the mixture using a twin-screw extruder until it is fully mixed and homogeneous; set the plasticizing temperature of the twin-screw extruder to 200℃ and the speed to 200rpm. 4. Fourth step: Cool the plasticized compound, granulate it, and then send it into the injection molding machine; 5. Step 5: Use an injection molding machine to inject the granular material into the perfume bottle cap mold; the injection temperature is 220℃, the injection pressure is 600 bar, the injection time is 5 seconds; the injection mold temperature is 30℃. 6. Step Six: After injection molding, cool to room temperature for 30 seconds, then demold to obtain the final bottle cap product.

[0033] Table of test results Sealing Chemical resistance UV protection Example 1 0.12 MPa / 24 hours No obvious discoloration, cracks, swelling or damage The bottle cap surface remains glossy, without obvious cracks or brittleness. Example 2 0.10 MPa / 24 hours No obvious discoloration, cracks, swelling or damage The bottle cap surface remains glossy, without obvious cracks or brittleness. Example 3 0.09 MPa / 24 hours No obvious discoloration, cracks, swelling or damage The bottle cap surface remains glossy, without obvious cracks or brittleness. Example 4 0.09 MPa / 24 hours No obvious discoloration, cracks, swelling or damage The bottle cap surface remains glossy, without obvious cracks or brittleness. Comparative Example 1 0.19 MPa / 24 hours Slight expansion, with cracks The bottle cap remains glossy but has slight discoloration and fine cracks. Comparative Example 2 0.16 MPa / 24 hours Slight expansion, with tiny cracks The bottle cap remains glossy but has slight discoloration; there are no cracks. Comparative Example 3 0.15 MPa / 24 hours No expansion, but has fine cracks. The bottle cap remains glossy but has slight discoloration; there are no cracks. Test results show that the perfume bottle cap prepared by this invention outperforms traditional single-material or ordinary composite system bottle caps in terms of sealing performance, chemical resistance, and UV resistance. The core innovation lies in the amidation reaction between the carboxyl groups of carboxylated styrene-butadiene rubber and the amino groups of terminal amino hyperbranched polyamide (molecular weight 1900-2200 g / mol), followed by the esterification reaction between the carboxyl groups and hydroxyl groups under the catalysis of tetrabutyl titanate. 8-hydroxyquinoline nickel stabilizes the reaction system through coordination. The cross-linked network constructed by these three components optimizes the material properties at the molecular structure level, which not only makes up for the shortcomings of traditional materials in terms of sealing performance and chemical resistance, but also maintains the advantages of simple and economical production, fully meeting the requirements of modern perfume packaging for high-performance bottle caps.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; 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; and these 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. A method for preparing a highly sealing and chemically resistant PP-ABS-K adhesive composite injection molded perfume bottle cap, characterized in that, Includes the following steps: Step 1: Weigh out PP, ABS, carboxylated styrene-butadiene rubber, amino-terminated hyperbranched polyamide, and 8-hydroxyquinoline nickel in a mass ratio of 40-60:30-40:10-15:0.3-0.6:0.002-0.02, add them to a high-speed mixer, heat to 90-110℃, and stir for 5-8 minutes; add 0.08-0.2 parts of tetrabutyl titanate catalyst, and continue stirring for 4-10 minutes to ensure uniform dispersion of the catalyst; Step 2: Add antioxidants, UV absorbers, and heat stabilizers to the mixed materials at a mass ratio of 0.1-1% of the mixed materials. Continue stirring until the total mixing time reaches 15-30 minutes. Step 3: Plasticize the mixture using a twin-screw extruder until it is fully mixed and homogeneous; Step 4: Cool the plasticized compound, granulate it, and then send it into the injection molding machine; Step 5: Use an injection molding machine to inject the granular material into the perfume bottle cap mold. The injection temperature is 220-240℃ and the injection pressure is 600-1000 bar. Step 6: After injection molding and cooling to room temperature, demold to obtain the final bottle cap product.

2. The method for preparing a high-sealing, chemical-resistant PP-ABS-K adhesive composite injection molded perfume bottle cap according to claim 1, characterized in that: The terminated amino hyperbranched polyamide has a concentration of 1900-2200 g / mol.

3. The method for preparing a high-sealing, chemical-resistant PP-ABS-K adhesive composite injection molded perfume bottle cap according to claim 1, characterized in that: The antioxidant is selected from 1080 or 1010.

4. The method for preparing a high-sealing, chemical-resistant PP-ABS-K adhesive composite injection molded perfume bottle cap according to claim 1, characterized in that: The ultraviolet absorber is selected from UV-531, Tinuvin 328 or UV-P.

5. The method for preparing a high-sealing, chemical-resistant PP-ABS-K adhesive composite injection molded perfume bottle cap according to claim 1, characterized in that: The heat stabilizer is heat stabilizer 264.

6. The method for preparing a high-sealing, chemical-resistant PP-ABS-K adhesive composite injection molded perfume bottle cap according to claim 1, characterized in that: The plasticizing temperature of the twin-screw extruder is set to 200-230℃, and the speed is set to 200-400rpm.

7. The method for preparing a high-sealing, chemical-resistant PP-ABS-K adhesive composite injection molded perfume bottle cap according to claim 1, characterized in that: The injection time of the injection molding machine is 5-10 seconds, and the cooling time is 30-60 seconds.

8. The method for preparing a high-sealing, chemical-resistant PP-ABS-K adhesive composite injection molded perfume bottle cap according to claim 1, characterized in that: The temperature of the injection mold is 30-50℃.