Preparation method of recycled polyester material for liquid phase pressurization

Abstract

The invention provides a preparation method of a recycled polyester material for liquid phase pressurization, and relates to the technical field of polyester materials, and the preparation method comprises the following steps: S1, material collection, S2, cleaning and treatment, S3, material classification and sorting, S4, material crushing, S5, thermoplastic softening, S6, additive mixing, S7, extrusion molding, and S8, cooling treatment. The temperature of the polyester material can be rapidly reduced through inert gas cooling, rapid curing of the polyester material is promoted, the production period can be accelerated, the production efficiency can be improved, deformation and shrinkage of the polyester material in the cooling process can be reduced through rapid cooling, the shape and size stability of a product can be kept, and therefore the quality and precision of the finished product are improved; the method reduces the risk of cracks and deformation caused by internal stress, improves the structural strength and stability of the product, can reduce the energy consumption by using inert gas cooling, avoids the problems of water resource waste and environmental pollution possibly caused by a traditional water cooling mode, and meets the requirements of energy conservation and environmental protection.

Description

Technical Field

[0001] The invention relates to the technical field of polyester materials, in particular to a method for preparing a recycled polyester material for liquid phase pressurization. Background Art

[0002] Liquid-phase boosting is a process typically used to increase the pressure of a liquid. This process often requires pressure-resistant materials to withstand the high pressure. Recycling polyester materials involves reprocessing discarded polyester into usable materials for use in the manufacture or maintenance of liquid-phase boosting equipment.

[0003] However, traditional polyester material preparation methods usually require the use of a large amount of chemical substances, such as organic solvents and catalysts, which will cause certain pollution to the environment. Traditional preparation methods may lead to certain unevenness and instability in the molecular structure and physical properties of polyester materials, affecting the quality and performance of the product; and traditional preparation methods use water cooling, and the water in the water cooling may cause corrosion of equipment and pipelines, especially under high temperature and high pressure conditions, which may affect the life and stability of the equipment, increase maintenance and replacement costs, and also cause waste of water resources. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a method for preparing recycled polyester materials for liquid-phase pressurization, which solves the problem that water in water cooling may cause corrosion to equipment and pipelines, especially under high temperature and high pressure conditions, which may affect the life and stability of the equipment, increase maintenance and replacement costs, and also cause waste of water resources.

[0005] To achieve the above objectives, the present invention provides a method for preparing a recycled polyester material for liquid phase pressurization through the following technical solutions, comprising the following steps:

[0006] S1. Material Collection

[0007] First, recycled polyester materials are collected, which can come from discarded plastic containers, bottles, packaging materials and waste containing polyester materials;

[0008] S2. Cleaning and processing

[0009] The polyester material collected in S1 is cleaned by a high-pressure spray cleaning machine. During the cleaning process, an appropriate amount of cleaning agent is added to remove dirt, grease or other impurities attached to the surface. After cleaning, it is dried in a dryer to ensure that the residual moisture during cleaning is removed;

[0010] S3. Material classification and sorting

[0011] The polyester materials cleaned in S2 are classified and sorted for subsequent processing and utilization. The classification can be done based on material type, color and shape;

[0012] S4. Material Crushing

[0013] The polyester materials classified in S3 are crushed by a crusher according to their types, colors and shapes. After being crushed into small particles or powder, they are collected and stored according to the above types through a collecting cylinder for better subsequent processing;

[0014] S5. Thermoplastic softening

[0015] The polyester material crushed in S4 is softened by passing it through a thermoplastic extruder, and the temperature inside the thermoplastic extruder is heated to 200-300° C. and the pressure is 1000-5000 psi;

[0016] S6. Mixed additives

[0017] The softened polyester material in S5 is added to the reactor, and then an appropriate amount of biodegradable agent, plasticizer, antioxidant and stabilizer are added. The interior is then heated to 20-45°C and stirred at a speed of 500-800 r / min. The stirring is continued for 5-15 minutes and then stopped. Then, an appropriate amount of antibacterial agent, anticorrosive agent and antistatic agent are added to the reactor, and then the interior is heated to 50-70°C and stirred at a speed of 500-1000 r / min. The stirring is continued for 10-25 minutes and then stopped.

[0018] S7. Extrusion molding

[0019] The product obtained in S6 is formed by a calender, heated and compressed at 160-220° C., and then molded into a desired shape through a die or an extruder.

[0020] S8. Cooling treatment

[0021] The polyester material formed in S7 is placed in a cooling box, and then an appropriate amount of inert gas is injected into the cooling box. After cooling and solidification, it is left to stand in the cooling box for more than 1 hour to obtain the formed polyester material.

[0022] Preferably, the entire process from step S4 to the end is prepared according to the types classified and sorted in step S3.

[0023] Preferably, in step S6, the biodegradation agent is polylactic acid, the plasticizer is cyclohexane, the antioxidant is diphenylamine, the stabilizer is phosphate ester, the antibacterial agent is barium chloride, the anticorrosive agent is polytetrafluoroethylene, and the electrostatic agent is copper powder.

[0024] The present invention provides a method for preparing recycled polyester material for liquid phase pressurization.

[0025] Beneficial effects:

[0026] 1. The present invention reduces environmental pollution and natural resource consumption by recycling discarded polyester materials. At the same time, the biodegradation agent added during the preparation process makes the final product more environmentally friendly, which helps to reduce pollution to soil and water sources. The use of discarded polyester materials for preparation saves the use of virgin polyester materials and helps to alleviate the problem of raw material shortage.

[0027] 2. The present invention can quickly reduce the temperature of the polyester material through inert gas cooling, prompting it to solidify quickly, which helps to speed up the production cycle and improve production efficiency. Rapid cooling can reduce the deformation and shrinkage of the polyester material during the cooling process, help maintain the shape and dimensional stability of the product, thereby improving the quality and precision of the finished product. Rapid cooling can also reduce stress accumulation inside the polyester material, reduce the risk of cracks and deformation caused by internal stress, and improve the structural strength and stability of the product. The use of inert gas cooling can reduce energy consumption, avoid the waste of water resources and environmental pollution problems that may be caused by traditional water cooling methods, and meet the requirements of energy conservation and environmental protection.

[0028] 3. The present invention can reduce the cost of raw material procurement and improve production efficiency by recycling and reusing waste polyester materials, thereby bringing economic benefits. During the preparation process, the waste polyester materials can be classified and sorted according to their type, color and shape, which helps to improve the efficiency of subsequent processing and the reuse rate of materials, reducing the waste of resources. In addition, the processing is carried out according to different types of polyester materials, which ensures that the strength of the polyester materials processed from the same materials is uniform.

[0029] 4. The present invention can increase the softness and ductility of polyester materials by adding plasticizers, improve their processing performance, and make them easier to shape. Antioxidants can effectively inhibit the oxidation reaction of polyester materials during processing and use, extend their service life, and improve the stability and durability of the product. Stabilizers can improve the thermal stability and weather resistance of polyester materials, reduce their aging and degradation under high temperature or ultraviolet light, and protect the surface gloss and appearance of the product. Antibacterial agents can effectively inhibit the growth of bacteria and mold, keep the product hygienic and clean, and extend its service life. Anticorrosive agents can prevent polyester materials from being corroded and damaged in humid or corrosive environments, and improve the durability and stability of the product. Antistatic agents can eliminate or reduce static electricity generated by polyester materials during processing, prevent the impact of static electricity on products, and improve the quality and surface smoothness of products. Therefore, the use of these specific additives can improve the performance and quality of polyester materials, making them more suitable for specific application scenarios such as liquid phase supercharging, and help to improve the competitiveness and market share of products. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example 1:

[0032] An embodiment of the present invention provides a method for preparing a recycled polyester material for liquid phase pressurization, comprising the following steps:

[0033] S1. Material Collection

[0034] First, recycled polyester materials are collected, which can come from discarded plastic containers, bottles, packaging materials and waste containing polyester materials;

[0035] S2. Cleaning and processing

[0036] The polyester material collected in S1 is cleaned by a high-pressure spray cleaning machine. During the cleaning process, an appropriate amount of cleaning agent is added to remove dirt, grease or other impurities attached to the surface. After cleaning, it is dried in a dryer to ensure that the residual moisture during cleaning is removed;

[0037] S3. Material classification and sorting

[0038] The polyester materials cleaned in S2 are classified and sorted for subsequent processing and utilization. The classification can be carried out according to material type, color and shape, which helps to improve the efficiency of subsequent processing and the reuse rate of materials;

[0039] S4. Material Crushing

[0040] The polyester materials classified in S3 are crushed by a crusher according to their types, colors and shapes. After being crushed into small particles or powder, they are collected and stored according to the above types through a collecting cylinder for better subsequent processing;

[0041] S5. Thermoplastic softening

[0042] The polyester material crushed in S4 is softened by passing it through a thermoplastic extruder, and the temperature inside the thermoplastic extruder is heated to 200° C. and the pressure is 1000 psi;

[0043] S6. Mixed additives

[0044] The softened polyester material in S5 is added to the reactor, and then an appropriate amount of biodegradable agent, plasticizer, antioxidant and stabilizer are added. The interior is then heated to 20°C and stirred at a speed of 500 r / min. The stirring is continued for 5 minutes and then stopped. Then, an appropriate amount of antibacterial agent, anticorrosive agent and antistatic agent are added to the reactor, and then the interior is heated to 50°C and stirred at a speed of 500 r / min. The stirring is continued for 10 minutes and then stopped.

[0045] S7. Extrusion molding

[0046] The product obtained in S6 is formed by a calender, heated and compressed at 160°C, and then molded into a desired shape through a die or an extruder.

[0047] S8. Cooling treatment

[0048] The polyester material formed in S7 is placed in a cooling box, and then an appropriate amount of inert gas is injected into the cooling box. After cooling and solidification, it is left to stand in the cooling box for more than 1 hour to ensure that its shape and structure are stable, thereby obtaining the formed polyester material;

[0049] By collecting and cleaning discarded polyester materials and processing them into new materials, resource recycling is achieved, the demand for original raw materials is reduced, and it is beneficial to resource conservation and environmental protection. The use of an appropriate amount of cleaning agent during the cleaning and treatment process can effectively remove surface dirt, grease or other impurities, reducing the pollution of waste to the environment. Sorting and sorting the cleaned materials helps to improve the efficiency of subsequent processing and the recycling rate of materials, reducing resource waste. By optimizing processing techniques such as thermoplastic softening and mixing additives, the performance and quality of the material can be improved, making it more suitable for applications such as liquid phase supercharging. The extrusion molding process can shape the material into different shapes as needed, increasing the diversity of products and meeting the needs of different scenarios. After cooling treatment, the molded polyester material is left to stand in a cooling box for more than 1 hour to ensure its shape and structure stability, thereby improving the quality and reliability of the product. This preparation method can not only achieve the recycling of waste resources, but also reduce pollution to the environment, improve the recycling rate of materials and the quality of products, and has good economic and environmental benefits.

[0050] The entire process from step S4 to the end is prepared according to the types classified and sorted in step S3; the biodegradation agent in step S6 is polylactic acid, the plasticizer is cyclohexane, the antioxidant is diphenylamine, the stabilizer is phosphate ester, the antibacterial agent is barium chloride, the anticorrosive agent is polytetrafluoroethylene, and the electrostatic agent is copper powder.

[0051] By adding biodegradable agents, the final product is made biodegradable, which helps reduce pollution to the environment and conforms to the concept of sustainable development. Plasticizers can increase the softness and ductility of polyester materials, improve their processing performance, and make them easier to form. Antioxidants can effectively inhibit the oxidation reaction of polyester materials during processing and use, extend their service life, and improve the stability and durability of the product. Stabilizers can improve the thermal stability and weather resistance of polyester materials, reduce their aging and degradation under high temperature or ultraviolet light, and protect the surface gloss and appearance of the product. Antibacterial agents can effectively inhibit the growth of bacteria and mold, maintain product hygiene and cleanliness, and extend the service life. Anticorrosive agents can prevent polyester materials from corrosion and damage in humid or corrosive environments, improving the durability and stability of the product. Antistatic agents can eliminate or reduce the static electricity generated by polyester materials during processing, prevent the impact of static electricity on the product, and improve the quality and surface smoothness of the product. Therefore, the use of these specific additives can improve the performance and quality of polyester materials, making them more suitable for specific application scenarios such as liquid phase supercharging, and help increase product competitiveness and market share.

[0052] Example 2:

[0053] An embodiment of the present invention provides a method for preparing a recycled polyester material for liquid phase pressurization, comprising the following steps:

[0054] S1. Material Collection

[0055] First, recycled polyester materials are collected, which can come from discarded plastic containers, bottles, packaging materials and waste containing polyester materials;

[0056] S2. Cleaning and processing

[0057] The polyester material collected in S1 is cleaned by a high-pressure spray cleaning machine. During the cleaning process, an appropriate amount of cleaning agent is added to remove dirt, grease or other impurities attached to the surface. After cleaning, it is dried in a dryer to ensure that the residual moisture during cleaning is removed;

[0058] S3. Material classification and sorting

[0059] The polyester materials cleaned in S2 are classified and sorted for subsequent processing and utilization. The classification can be carried out according to material type, color and shape, which helps to improve the efficiency of subsequent processing and the reuse rate of materials;

[0060] S4. Material Crushing

[0061] The polyester materials classified in S3 are crushed by a crusher according to their types, colors and shapes. After being crushed into small particles or powder, they are collected and stored according to the above types through a collecting cylinder for better subsequent processing;

[0062] S5. Thermoplastic softening

[0063] The polyester material crushed in S4 is softened by passing it through a thermoplastic extruder, and the temperature inside the thermoplastic extruder is heated to 300° C. and the pressure is 5000 psi;

[0064] S6. Mixed additives

[0065] The softened polyester material in S5 is added to the reactor, and then an appropriate amount of biodegradable agent, plasticizer, antioxidant and stabilizer are added. The interior is then heated to 45°C and stirred at a speed of 800 r / min. The stirring is continued for 15 minutes and then stopped. Then, an appropriate amount of antibacterial agent, anticorrosive agent and antistatic agent are added to the reactor, and then the interior is heated to 70°C and stirred at a speed of 1000 r / min. The stirring is continued for 25 minutes and then stopped.

[0066] S7. Extrusion molding

[0067] The product obtained in S6 is formed by a calender, heated and compressed at 220°C, and then molded into a desired shape through a die or an extruder.

[0068] S8. Cooling treatment

[0069] The polyester material formed in S7 is placed in a cooling box, and then an appropriate amount of inert gas is injected into the cooling box. After cooling and solidification, it is left to stand in the cooling box for more than 1 hour to ensure that its shape and structure are stable, thereby obtaining the formed polyester material;

[0070] By collecting and cleaning discarded polyester materials and processing them into new materials, resource recycling is achieved, the demand for original raw materials is reduced, and it is beneficial to resource conservation and environmental protection. The use of an appropriate amount of cleaning agent during the cleaning and treatment process can effectively remove surface dirt, grease or other impurities, reducing the pollution of waste to the environment. Sorting and sorting the cleaned materials helps to improve the efficiency of subsequent processing and the recycling rate of materials, reducing resource waste. By optimizing processing techniques such as thermoplastic softening and mixing additives, the performance and quality of the material can be improved, making it more suitable for applications such as liquid phase supercharging. The extrusion molding process can shape the material into different shapes as needed, increasing the diversity of products and meeting the needs of different scenarios. After cooling treatment, the molded polyester material is left to stand in a cooling box for more than 1 hour to ensure its shape and structure stability, thereby improving the quality and reliability of the product. This preparation method can not only achieve the recycling of waste resources, but also reduce pollution to the environment, improve the recycling rate of materials and the quality of products, and has good economic and environmental benefits.

[0071] The entire process from step S4 to the end is prepared according to the types classified and sorted in step S3; the biodegradation agent in step S6 is polylactic acid, the plasticizer is cyclohexane, the antioxidant is diphenylamine, the stabilizer is phosphate ester, the antibacterial agent is barium chloride, the anticorrosive agent is polytetrafluoroethylene, and the electrostatic agent is copper powder;

[0072] By adding biodegradable agents, the final product is made biodegradable, which helps reduce pollution to the environment and conforms to the concept of sustainable development. Plasticizers can increase the softness and ductility of polyester materials, improve their processing performance, and make them easier to form. Antioxidants can effectively inhibit the oxidation reaction of polyester materials during processing and use, extend their service life, and improve the stability and durability of the product. Stabilizers can improve the thermal stability and weather resistance of polyester materials, reduce their aging and degradation under high temperature or ultraviolet light, and protect the surface gloss and appearance of the product. Antibacterial agents can effectively inhibit the growth of bacteria and mold, maintain product hygiene and cleanliness, and extend the service life. Anticorrosive agents can prevent polyester materials from corrosion and damage in humid or corrosive environments, improving the durability and stability of the product. Antistatic agents can eliminate or reduce the static electricity generated by polyester materials during processing, prevent the impact of static electricity on the product, and improve the quality and surface smoothness of the product. Therefore, the use of these specific additives can improve the performance and quality of polyester materials, making them more suitable for specific application scenarios such as liquid phase supercharging, and help increase product competitiveness and market share.

[0073] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a recycled polyester material for liquid phase pressurization, characterized in that: The following steps are involved: S1. Material collection First, recycled polyester materials are collected, and the recycled polyester materials can come from discarded plastic containers, bottles, packaging materials, and waste containing polyester materials; S2. Cleaning and processing The polyester material collected in S1 is cleaned by a high-pressure spray cleaning machine. During the cleaning process, a proper amount of cleaning agent is added to remove dirt, grease or other impurities attached to the surface. After the cleaning is completed, it is dried by a dryer to ensure that the residual moisture during the cleaning is removed; S3. Material classification and sorting That is, the polyester material cleaned in S2 is classified and sorted for subsequent processing and utilization. The classification can be carried out according to material type, color and shape; S4. Material crushing According to the type, color and shape of the polyester materials classified in S3, the polyester materials are crushed by a crusher, and after being crushed into small particles or powder, they are collected and stored by a collecting cylinder according to the above types, so as to better carry out subsequent processing; S5. Thermoplastic softening The polyester material crushed in S4 is softened by a thermoplastic extruder, and the temperature inside the thermoplastic extruder is heated to 200-300° C. and the pressure is 1000-5000 psi; S6. Mixed additives Add the softened polyester material in S5 into the reactor, then add appropriate amount of biodegradable agent, plasticizer, antioxidant and stabilizer, then heat the interior to 20-45°C, stir the interior at a speed of 500-800r / min, continue stirring for 5-15min and then stop stirring, then add appropriate amount of antibacterial agent, anticorrosive agent and antistatic agent into the reactor, then heat the interior to 50-70°C, stir the interior at a speed of 500-1000r / min, continue stirring for 10-25min and then stop stirring; S7. Extrusion molding The product obtained in S6 is formed by a calender, heated and compressed at 160-220° C., and then molded into a desired shape by a die or an extruder; S8. Cooling treatment The polyester material formed in S7 is placed in a cooling box, and then a proper amount of inert gas is injected into the cooling box. After cooling and solidification, the material is left to stand in the cooling box for more than 1 hour to obtain the formed polyester material.

2. The method for preparing a recycled polyester material for liquid phase pressurization according to claim 1, characterized in that: The entire process from step S4 to the end is prepared according to the types classified and sorted in step S3.

3. The method for preparing a recycled polyester material for liquid phase pressurization according to claim 1, characterized in that: In the step S6, the biodegradation agent is polylactic acid, the plasticizer is cyclohexane, the antioxidant is diphenylamine, the stabilizer is phosphate ester, the antibacterial agent is barium chloride, the anticorrosive agent is polytetrafluoroethylene, and the electrostatic agent is copper powder.