Preparation method of high-toughness polyester material and application thereof in water cup

Abstract

This invention relates to the field of polyester materials technology, specifically to a method for preparing a high-toughness polyester material and its application in a water cup. The method comprises the following raw materials in parts by weight: 100 parts polybutylene terephthalate (PBT), 4-6 parts filler, 0.2-0.4 parts compatibility agent, and 0.1-0.3 parts antioxidant. In this invention, PBT acts as a toughening material, combining with sugarcane extract to form an energy absorption network, enhancing the polyester material's resistance to deformation. The double bonds of polyethylene glycol dimethacrylate (PEG-DMA) react with the double bonds of PBT and the hydroxyl groups of polycaprolactone diol to form chemical cross-linking points, bridging the various materials and enhancing the interfacial compatibility of the materials. This allows stress to be uniformly transferred from the matrix to the filler when the material is subjected to external force, preventing fracture caused by excessive local stress, thereby improving the toughness of the polyester water cup.

Description

Technical Field

[0001] This invention relates to the field of polyester material technology, specifically to a method for preparing a high-toughness polyester material and its application in a water cup. Background Technology

[0002] Polyester materials are polymeric compounds formed by the condensation polymerization of polyols and polyacids, and are widely used in packaging (such as beverage bottles and water cups), textiles (polyester fibers), engineering plastics, films and other fields.

[0003] In existing technologies, after polyester materials are used to prepare finished water cups, the poor bonding performance of the raw materials limits the overall toughness of the cups, making them prone to cracking and damage during daily use. Therefore, this invention provides a method for preparing a high-toughness polyester material and its application in water cups. Summary of the Invention

[0004] The purpose of this invention is to provide a method for preparing a high-toughness polyester material and its application in water cups. The high-toughness polyester material water cup prepared by this invention not only has good toughness properties but also excellent wear resistance, effectively improving the performance of the high-toughness polyester material water cup.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A high-toughness polyester material comprises the following raw materials in parts by weight: 100 parts polybutylene terephthalate, 4-6 parts filler, 0.2-0.4 parts compatibility agent, and 0.1-0.3 parts antioxidant; The filler is prepared by the following method: S1: Powder preparation, the raw materials of the powder include sugarcane leaves, acetic acid, anhydrous acetic anhydride, sulfuric acid, and mixed materials; S2: Preparation of additives, the raw materials of which include polycaprolactone diol, MBS, and polyethylene glycol dimethacrylate; S3: Mixing treatment, the powder and additives are stirred at 400-600 rpm for 40-60 min to obtain the filler.

[0006] Further, the method for preparing the powder is as follows: Sugarcane leaves are washed, dried, and then placed in an oven at 40-50°C for 6-8 hours. The resulting product is then ground to a particle size of 100-200 μm to obtain coarse powder. The coarse powder, acetic acid, anhydrous acetic anhydride, and sulfuric acid are added to a reaction vessel at a temperature of 50-60°C and a stirring speed of 200-400 rpm for 2-3 hours. After cooling to room temperature, the resulting product is centrifuged to obtain a precipitate. The precipitate is then treated with deionization... Wash the product with water until neutral, then place it in an oven and dry it at 40-50℃ for 6-8 hours to obtain dry powder. Add the dry powder and mixture to a mixer and stir it at 60-100 rpm for 10-20 minutes. Continue stirring the product in an ice-water bath for 20-40 minutes. Centrifuge the product to obtain precipitate, then place the precipitate in an oven and dry it at 40-50℃ for 15-20 hours. Grind the product to obtain a particle size ≤20μm to obtain powder.

[0007] Furthermore, the mass ratio of coarse powder, acetic acid, acetic anhydride, and sulfuric acid is 1:(3-5):(2-3):(0.02-0.04), and the mass ratio of dry powder to mixture is 1:(0.2-0.4).

[0008] Further, the mixture is prepared by the following method: conifer alcohol, pyrrolidone, 2-methyltetrahydrofuran, and palm wax are added to a reaction vessel, the reaction vessel is set at a temperature of 85-90°C, the stirring speed is 200-400 rpm, and the mixture is stirred at a constant temperature for 20-40 minutes to obtain the mixture.

[0009] Furthermore, the mass ratio of coniferol, pyrrolidone, 2-methyltetrahydrofuran, and palm wax is 1:(0.02-0.04):(0.04-0.06):(0.4-0.6).

[0010] Further, the additive is prepared by the following method: polycaprolactone diol is added to a flask, heated to 100-110°C and then vacuum dehydrated for 1-2 hours, then cooled to 80-90°C, MBS is added to the flask, and the mixture is kept warm and stirred for 40-60 minutes, then heated to 90-100°C, polyethylene glycol dimethacrylate is added, and the mixture is kept warm and stirred for 2-4 hours to obtain the additive.

[0011] Furthermore, the mass ratio of polycaprolactone diol, MBS, and polyethylene glycol dimethacrylate is 100:(10-30):(5-15).

[0012] Furthermore, the compatibility agent is selected from tris(2,4-di-tert-butylphenyl) phosphite, and the antioxidant is selected from phosphite antioxidants.

[0013] Furthermore, a method for preparing a high-toughness polyester material includes the following steps: polybutylene terephthalate is dried by forced air at 110–130°C for 3–5 hours; the dried polybutylene terephthalate, filler, compatibilizer, and antioxidant are added to a high-speed mixer and mixed evenly; then the mixture is fed into a twin-screw extruder. The processing temperature of the twin-screw extruder is: zone 1 220–230°C, zone 2 230–240°C, zone 3 240–250°C, zone 4 245–255°C, die head temperature 250–260°C, and screw speed 200–400 rpm. After melting, plasticizing, shearing, and mixing, the material is extruded from the die head. The extruded strip material is cooled and dried in a water tank and then pelletized by a pelletizer to obtain the high-toughness polyester material.

[0014] Furthermore, the application of a high-toughness polyester material prepared by a method for preparing a high-toughness polyester material includes the following steps: the high-toughness polyester material is dried at 120-140°C for 2-4 hours, then added to an injection molding machine and melt-treated at 240-260°C. The product obtained from the melt treatment is injected into the cavity of a water cup mold, and after pressure holding and cooling, it is taken out to obtain a water cup made of high-toughness polyester material.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, in the preparation of a high-toughness polyester water cup, sugarcane leaves are used as the base material in the powder. The sugarcane leaves are acetylated and then processed with the mixture to obtain a fine-particle-size powder. MBS acts as a toughening material, which can combine with sugarcane extract to form an energy absorption network, enhancing the deformation resistance of the polyester material. The double bonds of polyethylene glycol dimethacrylate can react with the double bonds of MBS and the hydroxyl groups of polycaprolactone diol to form chemical crosslinking points, which act as bridges for the various materials, enhancing the interfacial compatibility of the various materials in the polyester material. This allows the stress to be uniformly transferred from the matrix to the filler when the material is subjected to external force, avoiding fracture caused by excessive local stress, thereby improving the toughness of the polyester water cup.

[0016] 2. In this invention, by adding palm wax during the preparation of the mixture and then heating and stirring it, the palm wax can coat other components in the mixture. When the mixture participates in the molding and preparation of polyester materials, the coating of palm wax can delay the bonding, allowing the conifer alcohol component in the mixture to quickly bond with the polyester matrix at high temperature, thereby enabling it to better withstand external forces in the polyester matrix and further improving the toughness of the polyester material water cup. Attached Figure Description

[0017] Figure 1This invention provides a method for preparing a high-toughness polyester material and its formulation for use in a water cup. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that the raw materials used in the following embodiments are all commercially available.

[0020] Example 1: Raw material preparation: 100 parts polybutylene terephthalate, 4 parts filler, 0.2 parts compatibility agent, 0.1 parts antioxidant; The compatibility agent is tris(2,4-di-tert-butylphenyl) phosphite, and the antioxidant is a phosphite antioxidant. Packing material preparation: S1: Powder preparation, the raw materials of the powder include sugarcane leaves, acetic acid, anhydrous acetic anhydride, sulfuric acid, and mixed materials; The method for preparing the powder is as follows: Sugarcane leaves are washed, dried, and then placed in an oven at 40°C for 6 hours. The resulting product is then ground to a particle size of 100 μm to obtain coarse powder. The coarse powder, acetic acid, anhydrous acetic anhydride, and sulfuric acid are added to a reaction vessel at a set temperature of 50°C and a stirring speed of 200 rpm for 3 hours. After cooling to room temperature, the resulting product is centrifuged to obtain a precipitate. The precipitate is washed with deionized water until neutral and then placed in an oven at 40°C for drying. After 6 hours, dry powder was obtained. The dry powder and mixture were added to a mixer and stirred at 60 rpm for 10 minutes. The resulting product was then stirred continuously in an ice-water bath for 20 minutes. The resulting product was centrifuged to obtain precipitate, which was then placed in an oven and dried at 40°C for 15 hours. The resulting product was then ground to a particle size ≤20 μm to obtain powder. The mass ratio of coarse powder, acetic acid, acetic anhydride, and sulfuric acid was 1:3:2:0.02, and the mass ratio of dry powder to mixture was 1:0.2. The mixture was prepared by the following method: conifer alcohol, pyrrolidone, 2-methyltetrahydrofuran, and palm wax were added to a reaction vessel. The reaction vessel was set to a temperature of 85°C and a stirring speed of 200 rpm. The mixture was stirred at a constant temperature for 20 minutes to obtain the mixture. The mass ratio of conifer alcohol, pyrrolidone, 2-methyltetrahydrofuran, and palm wax was 1:0.02:0.04:0.4. S2: Preparation of additives, the raw materials of which include polycaprolactone diol, MBS, and polyethylene glycol dimethacrylate; The additive was prepared by the following method: Polycaprolactone diol was added to a flask, heated to 100°C and then vacuum dehydrated for 1 hour. After cooling to 80°C, MBS was added to the flask, and the mixture was kept warm and stirred for 40 minutes. Then, the temperature was raised to 90°C, polyethylene glycol dimethacrylate was added, and the mixture was kept warm and stirred for another 2 hours to obtain the additive. The mass ratio of polycaprolactone diol, MBS, and polyethylene glycol dimethacrylate was 100:10:5. S3: Mixing treatment, the powder and additives are stirred at 400 rpm for 40 min to obtain the filler; Preparation of high-toughness polyester material: Polybutylene terephthalate was dried by forced air at 110℃ for 3 hours. The dried polybutylene terephthalate, filler, compatibilizer, and antioxidant were added to a high-speed mixer and mixed evenly. The mixture was then fed into a twin-screw extruder. The processing temperatures of the twin-screw extruder were: Zone 1 220℃, Zone 2 230℃, Zone 3 240℃, Zone 4 245℃, Die head temperature 250℃, and screw speed 200 rpm. After melting, plasticizing, shearing, and mixing, the material was extruded from the die head. The extruded strip material was cooled and dried in a water tank and then pelletized by a pelletizer to obtain high-toughness polyester material. Water cup preparation: The high-toughness polyester material is dried at 120℃ for 2 hours, then added to the injection molding machine and melted at 240℃. The product obtained by melt treatment is injected into the mold cavity of the water cup, and after pressure holding and cooling, it is taken out to obtain the high-toughness polyester material water cup.

[0021] Example 2: Raw material preparation: 100 parts polybutylene terephthalate, 5 parts filler, 0.3 parts compatibility agent, 0.2 parts antioxidant; The compatibility agent is tris(2,4-di-tert-butylphenyl) phosphite, and the antioxidant is a phosphite antioxidant. Packing material preparation: S1: Powder preparation, the raw materials of the powder include sugarcane leaves, acetic acid, anhydrous acetic anhydride, sulfuric acid, and mixed materials; The method for preparing the powder is as follows: Sugarcane leaves are washed, dried, and then placed in an oven at 45°C for 7 hours. The resulting product is then ground to a particle size of 150 μm to obtain coarse powder. The coarse powder, acetic acid, anhydrous acetic anhydride, and sulfuric acid are added to a reaction vessel at a set temperature of 55°C and a stirring speed of 300 rpm for 2.5 hours. After cooling to room temperature, the resulting product is centrifuged to obtain a precipitate. The precipitate is washed with deionized water until neutral and then placed in an oven at 45°C for drying. After 7 hours, dry powder was obtained. The dry powder and mixture were added to a mixer and stirred at 80 rpm for 15 minutes. The resulting product was then continuously stirred in an ice-water bath for 30 minutes. The product was centrifuged to obtain a precipitate, which was then placed in an oven and dried at 45°C for 17 hours. The resulting product was then ground to a particle size ≤20 μm to obtain powder. The mass ratio of coarse powder, acetic acid, acetic anhydride, and sulfuric acid was 1:4:2.5:0.03, and the mass ratio of dry powder to mixture was 1:0.3. The mixture was prepared by the following method: conifer alcohol, pyrrolidone, 2-methyltetrahydrofuran, and palm wax were added to a reaction vessel. The reaction vessel was set to a temperature of 87°C and a stirring speed of 300 rpm. The mixture was stirred at a constant temperature for 30 minutes to obtain the mixture. The mass ratio of conifer alcohol, pyrrolidone, 2-methyltetrahydrofuran, and palm wax was 1:0.03:0.05:0.5. S2: Preparation of additives, the raw materials of which include polycaprolactone diol, MBS, and polyethylene glycol dimethacrylate; The additive was prepared by the following method: Polycaprolactone diol was added to a flask, heated to 105°C and then dehydrated under vacuum for 1.5 h, then cooled to 85°C, MBS was added to the flask, and the mixture was kept warm and stirred for 50 min, then heated to 95°C, polyethylene glycol dimethacrylate was added, and the mixture was kept warm and stirred for 3 h to obtain the additive. The mass ratio of polycaprolactone diol, MBS and polyethylene glycol dimethacrylate was 100:20:10. S3: Mixing treatment, the powder and additives are stirred at 500 rpm for 50 min to obtain the filler; Preparation of high-toughness polyester material: Polybutylene terephthalate was dried at 120℃ for 4 hours. The dried polybutylene terephthalate, filler, compatibilizer, and antioxidant were added to a high-speed mixer and mixed evenly. The mixture was then fed into a twin-screw extruder. The processing temperatures of the twin-screw extruder were: Zone 1 225℃, Zone 2 235℃, Zone 3 245℃, Zone 4 250℃, Die head temperature 255℃, and screw speed 300 rpm. After melting, plasticizing, shearing, and mixing, the material was extruded from the die head. The extruded strip material was cooled and dried in a water tank and then pelletized by a pelletizer to obtain high-toughness polyester material. Water cup preparation: The high-toughness polyester material is dried at 130℃ for 3 hours, then added to the injection molding machine and melted at 250℃. The product obtained by melt treatment is injected into the water cup mold cavity, held under pressure, cooled and removed to obtain a water cup made of high-toughness polyester material.

[0022] Example 3: Raw material preparation: 100 parts polybutylene terephthalate, 6 parts filler, 0.4 parts compatibility agent, 0.3 parts antioxidant; The compatibility agent is tris(2,4-di-tert-butylphenyl) phosphite, and the antioxidant is a phosphite antioxidant. Packing material preparation: S1: Powder preparation, the raw materials of the powder include sugarcane leaves, acetic acid, anhydrous acetic anhydride, sulfuric acid, and mixed materials; The method for preparing the powder is as follows: Sugarcane leaves are washed, dried, and then placed in an oven at 50°C for 8 hours. The resulting product is then ground to a particle size of 200 μm to obtain coarse powder. The coarse powder, acetic acid, anhydrous acetic anhydride, and sulfuric acid are added to a reaction vessel at a set temperature of 60°C and a stirring speed of 400 rpm for 2 hours. After cooling to room temperature, the resulting product is centrifuged to obtain a precipitate. The precipitate is washed with deionized water until neutral and then placed in an oven at 50°C for 8 hours. h, to obtain dry powder, dry powder and mixture are added to a mixer, the mixer is set to 100 rpm and stirred for 20 min, the resulting product is continuously stirred under ice water bath conditions for 40 min, the resulting product is centrifuged to obtain precipitate, the precipitate is sent to an oven and dried at 50℃ for 20 h, the resulting product is ground to a particle size ≤20 μm to obtain powder, wherein the mass ratio of coarse powder, acetic acid, acetic anhydride and sulfuric acid is 1:5:3:0.04, and the mass ratio of dry powder and mixture is 1:0.4; The mixture was prepared by the following method: conifer alcohol, pyrrolidone, 2-methyltetrahydrofuran, and palm wax were added to a reaction vessel, the reaction vessel was set to a temperature of 90℃, the stirring speed was 400 rpm, and the mixture was stirred at a constant temperature for 40 min to obtain the mixture. The mass ratio of conifer alcohol, pyrrolidone, 2-methyltetrahydrofuran, and palm wax was 1:0.04:0.06:0.6. S2: Preparation of additives, the raw materials of which include polycaprolactone diol, MBS, and polyethylene glycol dimethacrylate; The additive was prepared by the following method: Polycaprolactone diol was added to a flask, heated to 110°C and then vacuum dehydrated for 2 hours. After that, the temperature was lowered to 90°C, MBS was added to the flask, and the mixture was kept warm and stirred for 60 minutes. Then, the temperature was raised to 100°C, polyethylene glycol dimethacrylate was added, and the mixture was kept warm and stirred for another 4 hours to obtain the additive. The mass ratio of polycaprolactone diol, MBS and polyethylene glycol dimethacrylate was 100:30:15. S3: Mixing treatment, the powder and additives are stirred at 600 rpm for 60 min to obtain the filler; Preparation of high-toughness polyester material: Polybutylene terephthalate was dried in a forced-air dryer at 130℃ for 5 hours. The dried polybutylene terephthalate, filler, compatibilizer, and antioxidant were added to a high-speed mixer and mixed evenly. The mixture was then fed into a twin-screw extruder. The processing temperatures of the twin-screw extruder were: Zone 1 230℃, Zone 2 240℃, Zone 3 250℃, Zone 4 255℃, Die head temperature 260℃, and screw speed 400 rpm. After melting, plasticizing, shearing, and mixing, the material was extruded from the die head. The extruded strip material was cooled and dried in a water tank and then pelletized by a pelletizer to obtain high-toughness polyester material. Water cup preparation: The high-toughness polyester material is dried at 140℃ for 4 hours, then added to the injection molding machine and melted at 260℃. The product obtained by melt treatment is injected into the water cup mold cavity, held under pressure, cooled and removed to obtain a water cup made of high-toughness polyester material.

[0023] Comparative Example 1: The difference between this comparative example and Example 1 is that this comparative example does not contain any mixture.

[0024] Comparative Example 2 differs from Example 1 in that it does not contain powder; instead, it uses an equal amount of additives to replace fillers.

[0025] Comparative Example 3 differs from Example 1 in that it does not contain filler.

[0026] Performance testing: Performance tests were conducted on the high-toughness polyester material water cups prepared in Examples 1, 2, 3, 1, 2, 3, and 4. The test data are recorded in the table below:

[0027] In the performance test, the toughness test method is as follows: The high-toughness polyester material water cups prepared in Examples 1, 2, 3, Comparative Examples 1, 2, 3, and 4 are respectively fixed horizontally. A steel ball is dropped from above the mouth of the cup to conduct an impact test. The steel ball weighs 500g and the initial height is 0.5m. After each test, the height of the steel ball is increased by 0.1m and the test continues until obvious cracks appear on the surface of the bio-based copolyester water cup. The height data of the toughness test is obtained. The steel ball is repeatedly dropped from a height of 1m to impact the surface of the high-toughness polyester material water cup until obvious cracks appear on the surface of the high-toughness polyester material water cup. The number of toughness tests is obtained. The test method for wear resistance is as follows: The high-toughness polyester material water cups prepared in Examples 1, 2, 3, 1, 2, 3 and 4 are respectively fixed horizontally, and the surface of the water cups is rubbed using a friction testing machine. The friction pressure is 2000g, the reciprocating speed is 45 times / min, the friction stroke is 6cm, the friction material is a scouring pad, and the friction time is 4h. The weight of the water cups is measured before and after the friction treatment, and the weight difference before and after is obtained to obtain the wear resistance data.

[0028] It is evident that the toughness and wear resistance of the high-toughness polyester water cups prepared in Comparative Examples 1, 2, 3, and 4 are all lower than those in Examples 1, 2, and 3. This indicates that in the preparation of the high-toughness polyester water cup, sugarcane leaves are used as the base material in the powder. After acetylation treatment, the sugarcane leaves are processed with the mixture to obtain a finer powder. MBS acts as a toughening material, which can combine with sugarcane extract to form an energy absorption network, enhancing the deformation resistance of the polyester material. The double bonds of polyethylene glycol dimethacrylate can react with the double bonds of MBS and the hydroxyl groups of polycaprolactone diol to form chemical cross-linking points, which act as bridges for the various materials, enhancing the interfacial compatibility of the various materials in the polyester material. This allows the stress to be uniformly transferred from the matrix to the filler when the material is subjected to external force, avoiding fracture caused by excessive local stress, thereby improving the toughness of the polyester water cup. By adding palm wax during the preparation of the mixture and then heating and stirring it, the palm wax can coat other components in the mixture. When the mixture is used in the molding of polyester materials, the coating of palm wax can delay the bonding, allowing the conifer alcohol component in the mixture to quickly bond with the polyester matrix at high temperature, thus enabling it to better withstand external forces in the polyester matrix and further improving the toughness of the polyester material water cup.

[0029] By comparing and analyzing the relevant data in the table, it can be seen that the high-toughness polyester material water cup prepared by this invention not only has good toughness but also excellent wear resistance. This indicates that the high-toughness polyester material provided by this invention has a broader market prospect and is more suitable for widespread application.

[0030] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-toughness polyester material, characterized in that: It includes the following raw materials in parts by weight: 100 parts polybutylene terephthalate, 4 to 6 parts filler, 0.2 to 0.4 parts compatibility agent, and 0.1 to 0.3 parts antioxidant; The filler is prepared by the following method: S1: Powder preparation, the raw materials of the powder include sugarcane leaves, acetic acid, anhydrous acetic anhydride, sulfuric acid, and mixed materials; S2: Preparation of additives, the raw materials of which include polycaprolactone diol, MBS, and polyethylene glycol dimethacrylate; S3: Mixing treatment, the powder and additives are stirred at 400-600 rpm for 40-60 min to obtain the filler.

2. The high-toughness polyester material according to claim 1, characterized in that, The method for preparing the powder is as follows: Sugarcane leaves are washed, dried, and then placed in an oven at 40–50°C for 6–8 hours. The resulting product is then ground to a particle size of 100–200 μm to obtain coarse powder. The coarse powder, acetic acid, anhydrous acetic anhydride, and sulfuric acid are added to a reaction vessel at a temperature of 50–60°C and a stirring speed of 200–400 rpm for 2–3 hours. After cooling to room temperature, the resulting product is centrifuged to obtain a precipitate, which is then washed with deionized water. The mixture is dried to neutral and then placed in an oven at 40–50°C for 6–8 hours to obtain a dry powder. The dry powder and the mixture are then added to a mixer and stirred at 60–100 rpm for 10–20 minutes. The resulting product is then continuously stirred in an ice-water bath for 20–40 minutes. The resulting product is then centrifuged to obtain a precipitate, which is then placed in an oven at 40–50°C for 15–20 hours to obtain a powder. The resulting product is then ground to a particle size ≤20 μm to obtain a powder.

3. The high-toughness polyester material according to claim 2, characterized in that, The mass ratio of coarse powder, acetic acid, acetic anhydride and sulfuric acid is 1:(3-5):(2-3):(0.02-0.04), and the mass ratio of dry powder and mixture is 1:(0.2-0.4).

4. The high-toughness polyester material according to claim 2, characterized in that, The mixture is prepared by the following method: conifer alcohol, pyrrolidone, 2-methyltetrahydrofuran, and palm wax are added to a reaction vessel, the reaction vessel is set at a temperature of 85-90°C, the stirring speed is 200-400 rpm, and the mixture is stirred at a constant temperature for 20-40 minutes to obtain the mixture.

5. The high-toughness polyester material according to claim 4, characterized in that, The mass ratio of coniferyl alcohol, pyrrolidone, 2-methyltetrahydrofuran, and palm wax is 1:(0.02-0.04):(0.04-0.06):(0.4-0.6).

6. The high-toughness polyester material according to claim 1, characterized in that, The additive is prepared by the following method: Polycaprolactone diol is added to a flask, heated to 100-110°C and then vacuum dehydrated for 1-2 hours. After that, the temperature is lowered to 80-90°C, MBS is added to the flask, and the mixture is kept warm and stirred for 40-60 minutes. Then, the temperature is raised to 90-100°C, polyethylene glycol dimethacrylate is added, and the mixture is kept warm and stirred for another 2-4 hours to obtain the additive.

7. The high-toughness polyester material according to claim 6, characterized in that, The mass ratio of polycaprolactone diol, MBS, and polyethylene glycol dimethacrylate is 100:(10-30):(5-15).

8. The high-toughness polyester material according to claim 1, characterized in that, The compatibility agent is tris(2,4-di-tert-butylphenyl) phosphite, and the antioxidant is a phosphite antioxidant.

9. A method for preparing a high-toughness polyester material according to any one of claims 1 to 8, characterized in that, The process includes the following steps: Polybutylene terephthalate (PET) is dried by forced air at 110–130°C for 3–5 hours. The dried PET, filler, compatibilizer, and antioxidant are added to a high-speed mixer and mixed evenly. The mixture is then fed into a twin-screw extruder. The processing temperatures of the twin-screw extruder are: Zone 1 220–230°C, Zone 2 230–240°C, Zone 3 240–250°C, Zone 4 245–255°C, die head temperature 250–260°C, and screw speed 200–400 rpm. After melting, plasticizing, shearing, and mixing, the material is extruded from the die head. The extruded strips are cooled and dried in a water tank and then pelletized by a pelletizer to obtain the high-toughness polyester material.

10. The application of a high-toughness polyester material prepared by the method for preparing high-toughness polyester material according to claim 9, characterized in that, Includes the following steps: The high-toughness polyester material is dried at 120-140℃ for 2-4 hours, then added to an injection molding machine and melted at 240-260℃. The melt-treated product is injected into the mold cavity of the water cup, held under pressure, cooled, and then removed to obtain a high-toughness polyester material water cup.

Images