PET master batch, preparation method thereof, PET tableware and preparation method thereof

Abstract

The invention relates to the technical field of tableware preparation, and provides a PET master batch, a preparation method of the PET master batch, PET tableware and a preparation method of the PET tableware. 25 to 75 parts of a nucleating agent; 5 to 15 parts of an anti-scratch agent; 2 parts to 10 parts of an antioxidant; and 5-15 parts of a coloring agent. The demolding resistance can be reduced by increasing the content of the nucleating agent; in addition, the nucleation efficiency of the injection molding product can be improved, and the crystallization speed of the injection molding product is increased; and normal-temperature injection molding can be realized. Besides, the anti-scraping agent and the antioxidant are added into the formula, so that tableware prepared from the master batch has a good anti-scraping effect and is more resistant to aging. When the PET master batch disclosed by the invention is used for preparing PET tableware, due to the special design of a formula, the PET master batch is shorter in forming period, simpler in process, good in demolding performance, lower in production cost and good in surface scratch resistance when being used for subsequently preparing the PET tableware. Therefore, the formula provided by the invention is better in practicability.

Description

Technical Field

[0001] This invention relates to the field of tableware manufacturing technology, specifically to a PET masterbatch, its preparation method, PET tableware, and its preparation method. Background Technology

[0002] PET polyester is a green, low-carbon, and recyclable environmentally friendly material that also meets food-grade safety requirements, making it a popular choice for tableware production. However, because PET polyester is a semi-crystalline thermoplastic, its direct use in tableware manufacturing presents challenges such as insufficient heat resistance, long molding cycles, complex processes, poor demolding performance, and poor gloss.

[0003] To circumvent the above problems, the existing technical solution is as follows: Chinese invention patent application (application number 201811397400.5, publication number CN111100430A, publication title "Polyester Resin Composition and Method for Manufacturing High-Density Polyester Tableware") proposes a method of blending 45 wt% to 78 wt% PET with PBT to form a polyester alloy, then adding 20 wt% to 50 wt% inorganic filler and 1 wt% to 10 wt% additives such as lubricant, antioxidant, stabilizer, and colorant. After granulation to obtain plastic masterbatch, the masterbatch is injection molded into tableware. Subsequently, the tableware is post-crystallized by infrared irradiation for 10 to 20 minutes. Finally, the tableware is heat-transfer printed in a vacuum environment. Although the tableware prepared by this method has ceramic luster and good impact resistance, it requires additional post-crystallization treatment, and the preparation process is complex, time-consuming, and the cost of PBT raw materials is also high. Another Chinese invention patent application (application number 202211280812.7, publication number CN117844194A, publication title "Manufacturing Method of Heat-Resistant Tableware and Molded Heat-Resistant Tableware") adds organic and inorganic nucleating agents to the composite material and requires a mold temperature of not less than 110°C. The high-temperature mold achieves a slower cooling rate, providing sufficient crystallization time for the PET melt. However, this method has high processing energy consumption and production costs, and is not environmentally friendly. Furthermore, literature reports that the heat resistance of PET alloys can be improved by blending PET material with materials such as polycarbonate (PC) and polyethylene naphthalate (PEN). However, this method significantly increases costs and still suffers from problems such as long molding cycles, complex processes, poor demolding performance, and poor surface scratch resistance.

[0004] Therefore, the above methods can only improve some defects when addressing the problems of PET polyester tableware production. They cannot completely solve the problems of long molding cycles, complex processes, poor demolding performance, and poor surface scratch resistance, and may even create new problems, resulting in high production costs. Therefore, the existing PET masterbatch solutions are not very practical. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a PET masterbatch, a method for preparing the same, PET tableware, and a method for preparing the same.

[0006] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, a PET masterbatch is provided, comprising, in parts by weight: 25 to 75 parts of polyethylene terephthalate; Nucleating agent: 25 to 75 parts; 5 to 15 parts anti-scratch agent; Antioxidant 2 to 10 parts; 5 to 15 parts colorant.

[0007] In some embodiments, the nucleating agent is selected from at least one of the following: zinc / sodium / lithium salt of ethylene (meth)acrylate, CaCl2–PA-66, ZnCl2–PA-66, sodium / lithium salt, sodium copolyacrylate of ethylene, sodium / calcium salt of long-chain linear saturated carboxylic acids and their derivatives, sodium / calcium N-octylpyridine, alkali metal salts of polyester oligomers, ultrafine quartz powder, silica, special polypropylene, and special polyethylene.

[0008] In some embodiments, the anti-scratch agent is at least one of quartz powder, calcium stearate, pentaerythritol stearate, ethylene bis-stearamide, fatty amide, silicone powder, silica, high-melting-point paraffin wax, polyethylene wax, and octadecyl stearate.

[0009] In some embodiments, the antioxidant is at least one selected from pentaerythritol tetrakis(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, bis(4-octylphenol) diphosphate, octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, tris(2,4-di-tert-butylphenyl) phosphite, and pentaerythritol diisodecyl diphosphite.

[0010] In some embodiments, the colorant is at least one of titanium dioxide, barium sulfate, talc, calcium carbonate, zinc oxide, and iron oxide.

[0011] Secondly, a method for preparing PET masterbatch is provided, the method comprising: Add each component to a high-speed mixer in proportion and mix thoroughly to obtain a mixture; The mixture is added to a twin-screw extruder, melt-blended, and then extruded to obtain a melt. The melt is cooled and then granulated to obtain the product.

[0012] In some embodiments, the operating parameters of the twin-screw extruder are set as follows: the temperature of each section of the screw is 200℃~220℃ for the feeding section, 220℃~235℃ for the conveying section, 245℃~265℃ for the kneading section, 250℃~265℃ for the vacuum exhaust section, and 250℃~260℃ for the die extrusion section.

[0013] Thirdly, a PET tableware is provided, comprising, by weight, 2 to 20 parts of the PET masterbatch and 80 to 98 parts of PET resin.

[0014] Fourthly, a method for preparing PET tableware is provided, the method comprising: Mix the components evenly according to the proportions to obtain the mixture; The mixture is placed in a dryer for drying, and the drying is controlled until the moisture content reaches the specified value required by the process, thus obtaining the material to be processed; The material to be processed is integrally injection molded to form tableware products.

[0015] Compared with the prior art, the beneficial effects of this invention are as follows: The formulation of this application refines the grains of polyethylene terephthalate (PET) by increasing the content of the nucleating agent, making the internal structure of the material more uniform. Therefore, it can indirectly reduce the demolding resistance caused by uneven crystallization during the preparation of PET tableware using PET masterbatch as raw material. Furthermore, it can improve the nucleation efficiency of injection molded products and accelerate the crystallization speed, resulting in higher heat resistance compared to the prepared PBT composite tableware. The use of the nucleating agent also allows the injection molded products to fully crystallize at room temperature, eliminating the need for high-temperature molds to increase the crystallinity of the parts. This allows for a wider range of injection mold temperature processes, is more energy-efficient, and has broader applicability, suitable for existing room-temperature injection molding equipment, while also meeting food safety requirements. In addition, the addition of an anti-scratch agent to the formulation provides excellent scratch resistance to the subsequently produced PET tableware. The addition of antioxidants makes the subsequently produced PET tableware more resistant to aging. Therefore, it can be seen that the PET masterbatch of this application, due to its special formulation design, results in a shorter molding cycle, simpler process, better demolding performance, and better surface scratch resistance when subsequently manufacturing PET tableware. Furthermore, because the components in the formulation are relatively inexpensive, the production cost of the formulation in this application is lower compared to existing technologies in the background art. Therefore, the formulation of the PET masterbatch of this application has better practicality. Attached Figure Description

[0016] Figure 1 This is a schematic flowchart of the method for preparing PET masterbatch according to the present invention; Figure 2 This is a schematic flowchart of the preparation method of the PET tableware of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of the present invention.

[0018] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0019] A PET masterbatch is provided, comprising, by weight parts: 25 to 75 parts polyethylene terephthalate; 25 to 75 parts nucleating agent; 5 to 15 parts anti-scratch agent; 2 to 10 parts antioxidant; and 5 to 15 parts colorant.

[0020] Specifically, polyethylene terephthalate (PET) is commercially available PET chips or granules. Nucleating agents promote material crystallization by providing nuclei, shortening crystallization time, refining grains, and thus improving the material's transparency, rigidity, heat distortion temperature, and other properties. Anti-scratch agents enhance the surface hardness and abrasion resistance of the material, reducing marks caused by external friction and scratches. The core function of antioxidants is to inhibit or delay the aging of polymer materials due to oxidation during processing, storage, and use, preventing problems such as discoloration, brittleness, and decreased mechanical properties. Colorants are used to give the material the desired color.

[0021] The specific content of each component depends on actual production needs and is not specified here. An example is shown below: For example, polyethylene terephthalate can be set at 25 parts, 50 parts, or 75 parts; nucleating agent can be set at 25 parts, 50 parts, or 75 parts; anti-scratch agent can be set at 5 parts, 10 parts, or 15 parts; antioxidant can be set at 2 parts, 6 parts, or 10 parts; and colorant can be set at 5 parts, 7.5 parts, or 15 parts.

[0022] It is worth noting that the formulation of this application refines the grains of polyethylene terephthalate (PET) by increasing the content of the nucleating agent, resulting in a more uniform internal structure of the material. Therefore, it indirectly reduces the demolding resistance caused by uneven crystallization during the preparation of PET tableware using PET masterbatch as raw material. Furthermore, it improves the nucleation efficiency of injection-molded products and accelerates their crystallization speed, resulting in higher heat resistance compared to the prepared PBT composite tableware. The use of the nucleating agent also allows the injection-molded products to crystallize fully at room temperature, eliminating the need for high-temperature molds to increase the crystallinity of the parts. This allows for a wider range of injection molding temperature processes, is more energy-efficient, and has broader applicability, suitable for existing room-temperature injection molding equipment while meeting food safety requirements. Additionally, the addition of an anti-scratch agent to the formulation provides excellent scratch resistance to the subsequently produced PET tableware. The addition of antioxidants further enhances the aging resistance of the subsequently produced PET tableware. Therefore, it can be seen that the PET masterbatch of this application, due to its special formulation design, results in a shorter molding cycle, simpler process, better demolding performance, and better surface scratch resistance when subsequently manufacturing PET tableware. Furthermore, because the components in the formulation are relatively inexpensive, the production cost of the formulation in this application is lower compared to existing technologies. Therefore, the formulation of the PET masterbatch of this application is more practical. Moreover, it is understood that the proportions of each component in this application are appropriate, and each component can produce the optimal technical effect at this ratio, rather than a simple superposition of technologies.

[0023] The selection of each component in this application is based on actual production needs and is not limited herein.

[0024] The nucleating agent can be set as follows: Ionic polymer nucleating agents: Zinc ethylene (meth)acrylate, sodium ethylene (meth)acrylate, lithium ethylene (meth)acrylate, sodium ethylene-acrylate copolymer; Metal salt composite systems: CaCl2–PA-66, ZnCl2–PA-66, sodium salt, lithium salt; Organic acid salt nucleating agents: long-chain linear saturated carboxylate sodium salt and its derivatives, long-chain linear saturated carboxylate calcium salt and its derivatives, N-octylpyridine sodium salt, N-octylpyridine calcium salt; Polyester-related nucleating agents: alkali metal salts of polyester oligomers, such as sodium terephthalate (NaTPA). Inorganic nucleating agents: ultrafine quartz powder, silicon dioxide; Other: Special polypropylene, special polyethylene.

[0025] Furthermore, it can also be configured as a mixture of the above-mentioned nucleating agents, such as a mixture of zinc ethylene (meth)acrylate and sodium ethylene (meth)acrylate; or, for example, a mixture of CaCl2–PA-66 and ZnCl2–PA-66.

[0026] Anti-scratch agents can be formulated as follows: quartz powder, calcium stearate, pentaerythritol stearate, ethylene bis-stearamide, fatty amide, silicone powder, silica, high-melting-point paraffin wax, polyethylene wax, stearyl stearate, a mixture of calcium stearate and pentaerythritol stearate, a mixture of ethylene bis-stearamide and fatty amide, etc.

[0027] Antioxidants can be formulated as: pentaerythritol tetrakis(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, bis(4-octylphenol) diphosphate, n-octadecyl alcohol 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, tris(2,4-di-tert-butylphenyl) phosphite, pentaerythritol diphosphite diisodecyl ester, a mixture of pentaerythritol tetrakis(3,5-di-tert-butyl-4-hydroxyphenyl)propionate and bis(4-octylphenol) diphosphate, a mixture of bis(4-octylphenol) diphosphate and 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, etc.

[0028] Colorants can be set as: titanium dioxide, barium sulfate, talc, calcium carbonate, zinc oxide, iron oxide, a mixture of titanium dioxide, zinc oxide, barium sulfate, calcium carbonate, a mixture of titanium dioxide and iron oxide yellow, etc.

[0029] like Figure 1 As shown, a method for preparing PET masterbatch is provided, including the following steps: S110: Add each component to a high-speed mixer in proportion and mix evenly to obtain a mixture.

[0030] Specifically, polyethylene terephthalate, nucleating agent, anti-scratch agent, antioxidant and colorant are added to a high-speed mixer in proportion, the speed is 800 rpm to 1200 rpm, and the mixture is mixed for 10 to 15 minutes to obtain a fully mixed mixture.

[0031] S120: The mixture is added to a twin-screw extruder, melt-blended, and then extruded to obtain a melt.

[0032] Specifically, the melt is extruded through a twin-screw extruder. The temperatures of each section of the screw are as follows: feeding section 200℃~220℃, conveying section 220℃~235℃, kneading section 245℃~265℃, vacuum exhaust section 250℃~265℃, and die extrusion section 250℃~260℃. The screw speed is 250~400 r / min, and the vacuum degree is <~0.08MPa.

[0033] S130 involves cooling the molten material and then cutting it into pellets to obtain the product.

[0034] Specifically, the melt is rapidly cooled with water mist at 10℃~15℃, and then pelletized through a water ring. The cutter speed is adjusted according to the actual extrusion volume of the twin-screw extruder to obtain a product with a particle size of 2mm~3mm and an aspect ratio of approximately 1~1.5.

[0035] A PET tableware is provided, comprising, by weight, 2 to 20 parts of the above-mentioned PET masterbatch and 80 to 98 parts of PET resin.

[0036] Specifically, PET tableware can be prepared by mixing ordinary PET resin with the aforementioned PET masterbatch.

[0037] It is worth noting that this formula does not require the addition of high-cost materials such as polycarbonate (PC), polyethylene naphthalate (PEN), or PBT to improve the heat resistance of the composite material. Furthermore, it is suitable for existing room-temperature injection molding equipment, is energy-efficient and environmentally friendly, and meets food safety requirements.

[0038] like Figure 2 As shown, a method for preparing PET tableware is provided, including the following steps: S210: Mix the components evenly according to the proportion to obtain a mixture.

[0039] Specifically, a high-speed mixer is used to mix PET resin and PET masterbatch according to the specified ratio, with a speed of 500 rpm to 800 rpm and a time of 8 to 15 minutes, thereby obtaining a uniformly mixed material.

[0040] S220 involves placing the mixture in a dryer for drying, controlling the drying process until the moisture content reaches the specified value required by the process, thus obtaining the material to be processed.

[0041] Specifically, the mixture is placed in a dehumidifying dryer and dried at a temperature of 120℃ to 150℃ for 4 to 6 hours, while controlling the moisture content of the mixture to be ≤0.05%.

[0042] S230 involves injection molding the material to be processed into tableware products.

[0043] Specifically, the dried material to be processed is added to the hopper of the injection molding machine. After the equipment is started, the material is gradually heated and melted in the barrel through the feeding section (240℃~250℃), the compression section (250℃~260℃), and the melting section (260℃~270℃), finally reaching a plasticized state of 270℃~280℃ at the nozzle. Then, the melt is injected into the mold cavity of the tableware-specific mold at high speed with an injection pressure of 60MPa~100MPa. After the injection is completed, the pressure is immediately switched to 40MPa~60MPa and maintained for 5 seconds to 15 seconds. At the same time, the melt is cooled and shaped by the mold water cooling system of 30℃~50℃. After a cooling cycle of 10~30 seconds, the mold is opened, and the formed tableware product is pushed out of the cavity by the ejection mechanism. After being sprayed with cold water at 20℃~25℃ to further eliminate internal stress, it is sent to the next process by the conveyor belt. Throughout the process, the screw speed is maintained at 80 rpm to 120 rpm to ensure uniform plasticization of the melt. The barrel temperature, injection pressure and mold cooling effect must be monitored in real time to ensure that the product is free of missing material, bubbles or deformation.

[0044] Example: The present invention will be further illustrated below with reference to specific embodiments, but the scope of protection of the present invention is not limited to these embodiments. In each embodiment, unless otherwise specified, all raw materials used are commercially available raw materials, and all percentages are by weight.

[0045] Table 1 lists the PET tableware formulations of several examples and comparative examples. The examples and comparative examples in the table above were prepared in the following manner: A method for preparing PET tableware is provided, comprising the following steps: PET resin and PET masterbatch were mixed in a high-speed mixer at 650 rpm for 11 minutes according to the specified ratio, resulting in a uniformly mixed material.

[0046] The mixture is placed in a dehumidifying dryer and dried at 135°C for 5 hours.

[0047] The dried material to be processed is added to the injection molding machine hopper. After starting the equipment, the material undergoes gradual heating and melting in the barrel, passing through the feeding section (245℃), compression section (255℃), and melting section (265℃), finally reaching a plasticized state of 275℃ at the nozzle. The melt is then injected at high speed into the mold cavity of the tableware-specific mold at an injection pressure of 80MPa. Immediately after injection, the pressure is switched to 50MPa and maintained for 10 seconds. Simultaneously, the melt is cooled and solidified by a 40℃ mold water cooling system. After a 20-second cooling cycle, the mold opens, and the formed tableware product is pushed out of the cavity by the ejector mechanism. After being sprayed with 23℃ cold water to further eliminate internal stress, it is conveyed to the next process. Throughout the process, the screw maintains a speed of 100rpm to ensure uniform plasticization of the melt, and the barrel temperature, injection pressure, and mold cooling effect must be monitored in real time to ensure that the product is free of missing material, bubbles, or deformation.

[0048] The physical properties of the tableware prepared by the above-mentioned embodiments and comparative examples were tested at room temperature, and the test results are shown in Table 2.

[0049] Table 2 lists the mechanical performance evaluation results of the tableware products of the above-mentioned embodiments and comparative examples. In summary, in Examples 1 to 3, the heat distortion temperature was higher than 150°C, and the demolding performance, scratch resistance, dishwasher test, and drop resistance all met the standards. In contrast, the conventional tableware prepared in Comparative Example 1 had a lower heat distortion temperature, and its demolding performance, scratch resistance, and dishwasher test results all failed to meet the standards. Thus, it can be seen that the PET masterbatch formulation of this application can produce high-performance PET tableware, which is similar to ceramic in appearance, texture, color, and scratch resistance, and is also lighter, less prone to breakage, and has the advantages of simple molding process and short molding cycle. It is particularly suitable for applications on non-transparent PET materials requiring fast crystallization speed, high molding speed, and a heat distortion temperature greater than 150°C.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0053] In this invention, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0054] Although the description of the invention has been given in conjunction with the specific embodiments described above, it will be apparent to those skilled in the art that many substitutions, modifications, and variations can be made based on the foregoing. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A PET masterbatch, characterized in that, In parts by weight: 25 to 75 parts of polyethylene terephthalate; Nucleating agent: 25 to 75 parts; 5 to 15 parts anti-scratch agent; Antioxidant 2 to 10 parts; 5 to 15 parts colorant.

2. The PET masterbatch according to claim 1, characterized in that, The nucleating agent is selected from at least one of the following: zinc / sodium / lithium salt of ethylene (meth)acrylate, CaCl2–PA-66, ZnCl2–PA-66, sodium / lithium salt, sodium salt of ethylene-acrylate copolymer, sodium / calcium salt of long-chain linear saturated carboxylic acid and its derivatives, sodium / calcium salt of N-octylpyridine, alkali metal salts of polyester oligomers, ultrafine quartz powder, silica, special polypropylene, and special polyethylene.

3. The PET masterbatch according to claim 1, characterized in that, The anti-scratch agent is at least one of the following: quartz powder, calcium stearate, pentaerythritol stearate, ethylene bis-stearamide, fatty amide, silicone powder, silica, high-melting-point paraffin wax, polyethylene wax, and octadecyl stearate.

4. The PET masterbatch according to claim 1, characterized in that, The antioxidant is at least one of pentaerythritol tetrakis(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, bis(4-octylphenol) diphosphate, octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, tris(2,4-di-tert-butylphenyl) phosphite, and pentaerythritol diisodecyl diphosphite.

5. A PET masterbatch according to claim 1, characterized in that, The colorant is at least one of titanium dioxide, barium sulfate, talc, calcium carbonate, zinc oxide, and iron oxide.

6. A method for preparing PET masterbatch, characterized in that, The method for preparing the PET masterbatch according to any one of claims 1 to 5 comprises: Add each component to a high-speed mixer in proportion and mix thoroughly to obtain a mixture; The mixture is added to a twin-screw extruder, melt-blended, and then extruded to obtain a melt. The melt is cooled and then granulated to obtain the product.

7. The method for preparing PET masterbatch according to claim 6, characterized in that, The operating parameters of the twin-screw extruder are set as follows: the temperature of each section of the screw is 200℃~220℃ for the feeding section, 220℃~235℃ for the conveying section, 245℃~265℃ for the kneading section, 250℃~265℃ for the vacuum exhaust section, and 250℃~260℃ for the die extrusion section.

8. A type of PET tableware, characterized in that, The components include, by weight, 2 to 20 parts of the PET masterbatch as described in any one of claims 1 to 5, and 80 to 98 parts of PET resin.

9. A method for preparing PET tableware, characterized in that, The method for preparing the PET tableware of claim 8 comprises: Mix the components evenly according to the proportions to obtain the mixture; The mixture is placed in a dryer for drying, and the drying is controlled until the moisture content reaches the specified value required by the process, thus obtaining the material to be processed; The material to be processed is integrally injection molded to form tableware products.

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