Matt high-speed PETG modified material for 3D printing and preparation method of matte high-speed PETG modified material

Abstract

The invention discloses a matte high-speed PETG modified material for 3D printing and a preparation method thereof, and the matte high-speed PETG modified material for 3D printing comprises the following components in parts by weight: 55-90 parts of PETG resin, 1-20 parts of a toughening agent, 9-25 parts of a delustering agent, 0.3-1 part of an internal lubricant, 0.3-2 parts of an external lubricant, 0-1 part of an anti-hydrolysis agent and 0.1-0.8 part of an antioxidant. The preparation method comprises the following steps: mixing the PETG resin, the TPU resin, the calcium carbonate, the stearic acid, the organosilicon polymer and the antioxidant in proportion, mixing at a high speed by a high-speed mixer, and melting, plasticizing, extruding, pelletizing and drying by a double-screw extruder to obtain the 3D printing matte high-speed PETG modified material.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing materials, and in particular to a 3D printing matte high-speed PETG modified material and a preparation method thereof. Background Art

[0002] PETG (polyethylene terephthalate-1,4-cyclohexanedimethanol) is a non-crystalline copolyester with excellent transparency, heat resistance and impact resistance, and is inexpensive. It has broad application prospects in 3D printing FDM molding. PETG material has high thermal stability, good layer adhesion and printing fluidity, and can produce high-strength and high-precision objects. In addition, PETG is also a fully biodegradable material that can be completely decomposed into water and carbon dioxide by microorganisms under natural environmental conditions, achieving green and environmentally friendly sustainable development.

[0003] At present, 3D printed products with matte surface effects are becoming popular in the market. For example, in architectural design, 3D printing technology can create structures that are both light and strong; in consumer product manufacturing, 3D printing technology can achieve personalized customization and rapid prototyping. The continuous expansion of these application fields provides a broad market space for PETG materials. At the same time, as the market's requirements for the weight of 3D printed products continue to increase, higher requirements are also placed on the performance of PETG materials. Modified PETG materials with matte effects, high-speed printing and stable printing performance will be more popular in the market. However, the surface gloss of products printed with PETG materials is very high, which is not suitable for products that require matte effects on the surface; at the same time, PETG materials have high viscosity, slow printing speed, and easy to break wires during high-speed printing; during the 3D printing process, PETG materials may have unstable printing, such as poor interlayer bonding, wire drawing and other problems, which will affect the weight and accuracy of printed products. Therefore, it has become an urgent market demand to develop a PETG consumable with matte effects and high-speed printing for use in the 3D printing field. Summary of the invention

[0004] To achieve the above-mentioned purpose, the present invention provides a 3D printing matte high-speed PETG modified material and a preparation method thereof.

[0005] The present invention provides a 3D printing matte high-speed PETG modified material, which comprises the following components by weight:

[0006]

[0007] Furthermore, the melt index of the PETG resin at 240° C. and 2.16 kg load is 20-30 g / 10 min.

[0008] Furthermore, the toughening agent is one or more of thermoplastic polyurethane, ethylene-ethyl acrylate copolymer, ethylene-methyl acrylate-glycidyl methacrylate copolymer, ethylene-n-butyl acrylate-glycidyl methacrylate copolymer, reactive toughening agent, copolymer containing epoxy active functional group, styrene-methacrylate copolymer, ethylene-vinyl acetate-glycidyl methacrylate copolymer, methyl methacrylate-butadiene-styrene copolymer, polyolefin resin-maleic anhydride copolymer.

[0009] Furthermore, the matting agent is one or more of calcium carbonate, talc, montmorillonite, and silicon dioxide, and the particle size is preferably 325 mesh to 4000 mesh.

[0010] Furthermore, the internal lubricant is one or more of stearic acid, calcium stearate, RF-8, and pentaerythritol stearate (PETS).

[0011] Furthermore, the external lubricant is one or more of silicone polymers, acrylic multi-block copolymers, PTFE fluorinated polymers, and PPA fluorinated polymers.

[0012] Furthermore, the anti-hydrolysis agent is one or more of monomeric carbodiimide and polymeric carbodiimide.

[0013] Furthermore, the antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 1098, and antioxidant 168.

[0014] In a second aspect, the present invention provides a method for preparing the above-mentioned 3D printing matte high-speed PETG modified material, comprising the following steps:

[0015] Step S1, weighing raw materials according to the proportion of each component of the 3D printing matte high-speed PETG modified material, adding them into a high-speed mixer, and mixing at a high speed for 5min-10min to obtain a mixture;

[0016] Step S2, adding the mixture into a hopper of a twin-screw extruder, and melting, plasticizing, mixing, extruding, pelletizing, and drying the raw materials at a temperature of 190° C. to 230° C. through the twin-screw extruder to obtain a 3D printing matte high-speed PETG modified material.

[0017] Furthermore, the high-speed mixing is performed for 5 min-10 min, and the raw materials are melted at a temperature of 190° C.-230° C. by a twin-screw extruder.

[0018] The present invention provides a 3D printing matte high-speed PETG modified material and a preparation method thereof, and a preparation method and application thereof, which have the following beneficial effects:

[0019] 1. This solution uses an internal lubricant and an external lubricant in combination. The internal lubrication function of the internal lubricant is used to reduce the internal friction of the material during material processing, promote the uniform dispersion of the matting agent in the modified material, and make the performance of the printing wire prepared by the modified material uniform; the external lubricant can migrate to the surface of the wire during the production of the printing wire, which can reduce the friction between the polymer melt and the inner wall of the die of the wire extruder during the production of the wire, thereby reducing the problem of material accumulation at the die; at the same time, the external lubricant migrates to the surface of the polymer melt during the printing process of the wire, reducing the friction between the polymer melt and the inner wall of the printer nozzle during printing, making the printing process smoother, solving the industry pain point of PETG wire sticking to the nozzle, and effectively improving the printing performance of the wire;

[0020] 2. Through the combination of ingredients in a specific ratio, the 3D printing matte high-speed PETG modified material of this embodiment has high toughness and enhances the physical strength of the printed product; the use of a matting agent with a suitable particle size can significantly improve the frosted texture of the appearance of the printed product, and enhance the visual effect and aesthetics of the product; through the use of internal and external lubricants, the dispersibility of the matting agent in the material is effectively improved to ensure that the appearance of the printed product is uniform; after the modified PETG material is prepared into a 3D printing wire, it is not easy to break the wire or clog the printer nozzle during printing, which greatly improves the smoothness and stability of printing; compared with conventional PETG 3D printing wire, the wire obtained in this scheme has a significant improvement in printing speed, which can reach more than 350mm / s, thereby improving printing efficiency; the modified material effectively improves the problem of PETG material easily sticking to the nozzle during printing, reducing printing failures and downtime; the preparation method provided in this application can effectively reduce the problem of material accumulation at the die of the wire extruder during wire production, thereby ensuring production efficiency and product qualification rate, and reducing production costs;

[0021] 3. Through the precise proportion of key ingredients such as PETG resin, TPU resin, and calcium carbonate, this material not only maintains excellent toughness, but also achieves a dual improvement in matte effect and high-speed printing performance, meeting the needs of diversified applications; the TPU resin added to the formula not only improves the elasticity of the material, but also enhances its wear resistance and tear resistance, making the printed products more durable and extending the service life; calcium carbonate, as an inorganic filler, not only effectively reduces the cost of the material, but also improves the rigidity and dimensional stability of the material through its high hardness and high filling capacity, providing good support performance for the printed products; stearic acid, as an internal lubricant, helps to reduce the friction and energy consumption of the material during processing; and silicone polymers, as external lubricants, improve the fluidity and demoulding properties of the material, making the material easier to handle and shape during 3D printing; the antioxidant 1010 added to the formula can effectively prevent the material from being degraded due to oxidation during processing and use, thereby extending the service life of the material and maintaining its long-term stability; all ingredients selected for this material meet environmental protection requirements, are non-toxic and harmless, and will not cause pollution to the environment during production and use. At the same time, the material also has good biocompatibility and is suitable for applications in sensitive fields such as medical and food packaging. DETAILED DESCRIPTION

[0022] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0023] Unless otherwise specified, the examples and comparative examples are parallel tests with the same components, component contents, preparation steps and preparation parameters. The experimental methods in the following examples are conventional methods unless otherwise specified. The experimental materials used in the following examples are purchased from commercial channels unless otherwise specified.

[0024] Unless otherwise stated, all reagents were used as received without further purification.

[0025] In the preparation examples and embodiments of the present invention, the "parts" are parts by weight unless otherwise specified, and the concentration percentages are concentrations by weight unless otherwise specified.

[0026] Example 1

[0027] This embodiment provides a 3D printing matte high-speed PETG modified material, and the preparation method thereof specifically comprises the following steps:

[0028] Step S1, according to the proportion of each component of the 3D printing matte high-speed PETG modified material, 90 parts of PETG resin (brand CR-5511, produced by China Resources Chemical Materials Co., Ltd.), 1 part of TPU resin (brand E695, produced by Meirui New Materials Co., Ltd.), 9 parts of calcium carbonate (325 mesh), 0.3 parts of stearic acid, 0.3 parts of silicone polymer (brand EM I-150C, produced by Jiayirong Co., Ltd.), and 0.1 parts of antioxidant 1010 were weighed and added into a high-speed mixer, and mixed at high speed for 5min-10min to obtain a mixture;

[0029] Step S2, adding the mixture into a hopper of a twin-screw extruder, and melting, plasticizing, mixing, extruding, pelletizing, and drying the raw materials at a temperature of 190° C. to 230° C. through the twin-screw extruder to obtain a 3D printing matte high-speed PETG modified material.

[0030] Printing Performance Test The 3D printing filament was prepared in the following manner.

[0031] The obtained 3D printing matte high-speed PETG modified material was added into the 3D printing wire extruder, melted and plasticized at a temperature of 190°C-220°C to draw the 3D printing wire for printing test, with a wire diameter of 1.75 mm.

[0032] Example 2

[0033] This embodiment provides a 3D printing matte high-speed PETG modified material, and the preparation method thereof specifically comprises the following steps:

[0034] Step S1, according to the proportion of each component of the 3D printing matte high-speed PETG modified material, 70 parts of PETG resin (grade WS-501N, produced by Huahong Company), 9 parts of ethylene-ethyl acrylate copolymer (grade ElvaloyAC2116, produced by DuPont), 1 part of reactive toughening agent (grade CM8106, produced by Zhejiang Hongwu Company), 13 parts of calcium carbonate (3000 mesh), 5 parts of talc (800 mesh), 2 parts of silicon dioxide (grade TAI SIL 210, produced by Guangzhou Shuntai Company), 0.5 parts of calcium stearate, 0.8 parts of PPA-based fluorine-containing polymer (grade FR8120, produced by Shangrui Plastic Company), 0.3 parts of antioxidant 1098, and 0.3 parts of antioxidant 168 are weighed and added into a high-speed mixer, and mixed at high speed for 5min-10min to obtain a mixture;

[0035] Step S2, adding the mixture into a hopper of a twin-screw extruder, and melting, plasticizing, mixing, extruding, pelletizing, and drying the raw materials at a temperature of 190° C. to 230° C. through the twin-screw extruder to obtain a 3D printing matte high-speed PETG modified material.

[0036] Printing Performance Test The 3D printing filament was prepared in the following manner.

[0037] The obtained 3D printing matte high-speed PETG modified material was added into the 3D printing wire extruder, melted and plasticized at a temperature of 190°C-220°C to draw the 3D printing wire for printing test, with a wire diameter of 1.75 mm.

[0038] Example 3

[0039] This embodiment provides a 3D printing matte high-speed PETG modified material, and the preparation method thereof specifically comprises the following steps:

[0040] Step S1, according to the proportion of each component of the 3D printing matte high-speed PETG modified material, 65 parts of PETG resin (grade WS-502, produced by Huahong Company), 9 parts of ethylene-methyl acrylate-glycidyl methacrylate copolymer (grade AX8900, produced by Arkema), 1 part of epoxy-active functional group-containing copolymer (grade HPC-3510P, produced by Jiayirong Company), 15 parts of calcium carbonate (2000 mesh), 5 parts of calcium carbonate (4000 mesh), 5 parts of montaut (800 mesh), 1 part of lubricant RF-8 (produced by Ruijie New Materials), 2 parts of PTFE-based fluorine-containing polymers (grade T600, produced by Shangrui Plastic Company), 1 part of monomeric carbodiimide (grade HyMax1010, produced by Shanghai Langyi Company), 0.4 parts of antioxidant 1076, and 0.4 parts of antioxidant 168 are added to a high mixer and mixed at high speed for 5min-10min to obtain a mixture;

[0041] Step S2, adding the mixture into a hopper of a twin-screw extruder, and melting, plasticizing, mixing, extruding, pelletizing, and drying the raw materials at a temperature of 190° C. to 230° C. through the twin-screw extruder to obtain a 3D printing matte high-speed PETG modified material.

[0042] Printing Performance Test The 3D printing filament was prepared in the following manner.

[0043] The obtained 3D printing matte high-speed PETG modified material was added into the 3D printing wire extruder, melted and plasticized at a temperature of 190°C-220°C to draw the 3D printing wire for printing test, with a wire diameter of 1.75 mm.

[0044] Example 4

[0045] This embodiment provides a 3D printing matte high-speed PETG modified material, and the preparation method thereof specifically comprises the following steps:

[0046] Step S1, according to the proportion of each component of the 3D printing matte high-speed PETG modified material, 55 parts of PETG resin (brand GX-702, produced by Guoxin Juzhi New Materials Co., Ltd.), 15 parts of methyl methacrylate-butadiene-styrene copolymer (brand E-920, produced by Arkema), 10 parts of POE-g-MAH (brand Y27, Jiuju Polymer), 20 parts of talc (2500 mesh), 0.6 parts of pentaerythritol stearate, 1.5 parts of acrylic multi-block copolymer (brand AC1125, produced by DOW), 0.5 parts of polymeric carbodiimide (brand HyMax210, produced by Shanghai Langyi Company), and 0.5 parts of antioxidant 1098 were weighed and added into a high mixer, and mixed at high speed for 5min-10min to obtain a mixture;

[0047] Step S2, adding the mixture into a hopper of a twin-screw extruder, and melting, plasticizing, mixing, extruding, pelletizing, and drying the raw materials at a temperature of 190° C. to 230° C. through the twin-screw extruder to obtain a 3D printing matte high-speed PETG modified material.

[0048] Printing Performance Test The 3D printing filament was prepared in the following manner.

[0049] The obtained 3D printing matte high-speed PETG modified material was added into the 3D printing wire extruder, melted and plasticized at a temperature of 190°C-220°C to draw the 3D printing wire for printing test, with a wire diameter of 1.75 mm.

[0050] Example 5

[0051] This embodiment provides a 3D printing matte high-speed PETG modified material, and the preparation method thereof specifically comprises the following steps:

[0052] Step S1, according to the proportion of each component of the 3D printing matte high-speed PETG modified material, 60 parts of PETG resin (brand GX-702, produced by Guoxin Juzhi New Materials Co., Ltd.), 15 parts of ethylene-vinyl acetate-glycidyl methacrylate copolymer (brand NPG, produced by Arlanxeo), 1 part of styrene-methacrylate copolymer (brand SG-20, produced by Jiayirong Company), 24 parts of talc (2500 mesh), 0.6 parts of pentaerythritol stearate, 1 part of silicone polymer (brand PPA-Si E, produced by Kunshan Rongdian Company), 0.8 parts of monomeric carbodiimide (brand HyMax1010, produced by Shanghai Langyi Company), 0.6 parts of antioxidant 1010 were weighed and added into a high-speed mixer, and mixed at high speed for 5min-10min to obtain a mixture;

[0053] Step S2, adding the mixture into a hopper of a twin-screw extruder, and melting, plasticizing, mixing, extruding, pelletizing, and drying the raw materials at a temperature of 190° C. to 230° C. through the twin-screw extruder to obtain a 3D printing matte high-speed PETG modified material.

[0054] Printing Performance Test The 3D printing filament was prepared in the following manner.

[0055] The obtained 3D printing matte high-speed PETG modified material was added into the 3D printing wire extruder, melted and plasticized at a temperature of 190°C-220°C to draw the 3D printing wire for printing test, with a wire diameter of 1.75 mm.

[0056] Comparative Example 1

[0057] This embodiment provides a 3D printing matte high-speed PETG modified material, and the preparation method thereof specifically comprises the following steps:

[0058] Step S1, according to the proportion of each component of the 3D printing matte high-speed PETG modified material, 70 parts of PETG resin (grade WS-501N, produced by Huahong Company), 9 parts of ethylene-ethyl acrylate copolymer (grade ElvaloyAC2116, produced by DuPont), 1 part of reactive toughening agent (grade CM8106, produced by Zhejiang Hongwu Company), 13 parts of calcium carbonate (3000 mesh), 5 parts of talc (800 mesh), 2 parts of silicon dioxide (grade TAI SIL 210, produced by Guangzhou Shuntai Company), 0.8 parts of PPA-type fluorine-containing polymer (grade FR8120, produced by Shangrui Plastic Company), 0.3 parts of antioxidant 1098, and 0.3 parts of antioxidant 168 are weighed and added into a high-speed mixer, and mixed at high speed for 5min-10min to obtain a mixture;

[0059] Step S2, adding the mixture into a hopper of a twin-screw extruder, and melting, plasticizing, mixing, extruding, pelletizing, and drying the raw materials at a temperature of 190° C. to 230° C. through the twin-screw extruder to obtain a 3D printing matte high-speed PETG modified material.

[0060] Printing Performance Test The 3D printing filament was prepared in the following manner.

[0061] The obtained 3D printing matte high-speed PETG modified material was added into the 3D printing wire extruder, melted and plasticized at a temperature of 190°C-220°C to draw the 3D printing wire for printing test, with a wire diameter of 1.75 mm.

[0062] Comparative Example 2

[0063] This embodiment provides a 3D printing matte high-speed PETG modified material, and the preparation method thereof specifically comprises the following steps:

[0064] Step S1, according to the proportion of each component of the 3D printing matte high-speed PETG modified material, 70 parts of PETG resin (grade WS-501N, produced by Huahong Company), 9 parts of ethylene-ethyl acrylate copolymer (grade ElvaloyAC2116, produced by DuPont), 1 part of reactive toughening agent (grade CM8106, produced by Zhejiang Hongwu Company), 13 parts of calcium carbonate (3000 mesh), 5 parts of talc (800 mesh), 2 parts of silicon dioxide (grade TAI SIL 210, produced by Guangzhou Shuntai Company), 0.5 parts of calcium stearate, 0.3 parts of antioxidant 1098, and 0.3 parts of antioxidant 168 were weighed and added into a high mixer, and mixed at high speed for 5min-10min to obtain a mixture;

[0065] Step S2, adding the mixture into a hopper of a twin-screw extruder, and melting, plasticizing, mixing, extruding, pelletizing, and drying the raw materials at a temperature of 190° C. to 230° C. through the twin-screw extruder to obtain a 3D printing matte high-speed PETG modified material.

[0066] Printing Performance Test The 3D printing filament was prepared in the following manner.

[0067] The obtained 3D printing matte high-speed PETG modified material was added into the 3D printing wire extruder, melted and plasticized at a temperature of 190°C-220°C to draw the 3D printing wire for printing test, with a wire diameter of 1.75 mm.

[0068] Comparative Example 3

[0069] This embodiment provides a 3D printing matte high-speed PETG modified material, and the preparation method thereof specifically comprises the following steps:

[0070] Step S1, according to the proportion of each component of the 3D printing matte high-speed PETG modified material, 80 parts of PETG resin (grade WS-501N, produced by Huahong Company), 13 parts of calcium carbonate (3000 mesh), 5 parts of talc (800 mesh), 2 parts of silicon dioxide (grade TAI SIL 210, produced by Guangzhou Shuntai Company), 0.5 parts of calcium stearate, 0.8 parts of PPA-based fluorine-containing polymer (grade FR8120, produced by Shangrui Plastic Company), 0.3 parts of antioxidant 1098, and 0.3 parts of antioxidant 168 were weighed and added into a high-speed mixer, and mixed at high speed for 5min-10min to obtain a mixture;

[0071] Step S2, adding the mixture into a hopper of a twin-screw extruder, and melting, plasticizing, mixing, extruding, pelletizing, and drying the raw materials at a temperature of 190° C. to 230° C. through the twin-screw extruder to obtain a 3D printing matte high-speed PETG modified material.

[0072] Printing Performance Test The 3D printing filament was prepared in the following manner.

[0073] The obtained 3D printing matte high-speed PETG modified material was added into the 3D printing wire extruder, melted and plasticized at a temperature of 190°C-220°C to draw the 3D printing wire for printing test, with a wire diameter of 1.75 mm.

[0074] Performance test standards:

[0075] The Izod impact strength test standard is GB / T 1843-2008.

[0076] The gloss test standard is ASTM D2457-21, with a measuring angle of 60°.

[0077] Printing performance: Place the filament on the printer, print the product according to the model, visually inspect the nozzle discharge smoothness during printing, the frosted texture of the printed product, and whether there is any breakage, nozzle blockage, or nozzle sticking after 48 hours of continuous printing; print a grid model to evaluate the filament printing speed.

[0078] Die buildup performance: Add the modified material into the wire extruder for continuous production for more than 1 hour, and observe the die buildup of the wire extruder.

[0079] The test results of the printing performance of the modified materials and wires in Examples 1-5 and Comparative Examples 1-3 are shown in Table 1:

[0080]

[0081]

[0082] As can be seen from Table 1, the modified material not only has high toughness, but also uses a matte agent with a suitable particle size to significantly improve the frosted texture of the printed product. The use of internal and external lubricants can greatly improve the dispersibility of the matte agent, so that the 3D printing wire prepared by the modified material can print smoothly, not easy to break the wire, not easy to block the printer nozzle, and improve the problems of PETG material sticking to the nozzle and slow printing speed; compared with the conventional PETG 3D printing wire, the printing speed can only be printed at a speed lower than 300mm / s, and the 3D printing matte high-speed PETG wire obtained by this scheme can reach a printing speed of more than 350mm / s. At the same time, it can effectively reduce the problem of material accumulation at the die mouth of the wire extruder during wire production, ensuring production efficiency and product qualification rate.

[0083] The specific embodiments of the present invention are described in detail above, but they are only examples, and the present invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions made to the present invention are also within the scope of the present invention. Therefore, the equalization changes and modifications made without departing from the spirit and scope of the present invention should be included in the scope of the present invention.

Claims

1. A 3D printing matte high-speed PETG modified material, characterized in that: The following components are included by weight:

2. The 3D printing matte high-speed PETG modified material according to claim 1, characterized in that: The melt index of the PETG resin at 240° C. and 2.16 kg load is 20-30 g / 10 min.

3. The 3D printing matte high-speed PETG modified material according to claim 1, characterized in that: The toughening agent is one or more of thermoplastic polyurethane, ethylene-ethyl acrylate copolymer, ethylene-methyl acrylate-glycidyl methacrylate copolymer, ethylene-n-butyl acrylate-glycidyl methacrylate copolymer, reactive toughening agent, copolymer containing epoxy active functional group, styrene-methacrylate copolymer, ethylene-vinyl acetate-glycidyl methacrylate copolymer, methyl methacrylate-butadiene-styrene copolymer, polyolefin resin-maleic anhydride copolymer.

4. The 3D printing matte high-speed PETG modified material according to claim 1, characterized in that: The matting agent is one or more of calcium carbonate, talcum powder, montmorillonite and silicon dioxide, and the particle size is preferably 325 mesh to 4000 mesh.

5. The 3D printing matte high-speed PETG modified material according to claim 1, characterized in that: The internal lubricant is one or more of stearic acid, calcium stearate, RF-8, and pentaerythritol stearate (PETS).

6. The 3D printing matte high-speed PETG modified material according to claim 1, characterized in that: The external lubricant is one or more of an organic silicon polymer, an acrylic multi-block copolymer, a PTFE fluorine-containing polymer, and a PPA fluorine-containing polymer.

7. The 3D printing matte high-speed PETG modified material according to claim 1, characterized in that: The anti-hydrolysis agent is one or more of monomeric carbodiimide and polymeric carbodiimide.

8. The 3D printing matte high-speed PETG modified material according to claim 1, characterized in that: The antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 1098, and antioxidant 168.

9. A method for preparing a 3D printing matte high-speed PETG modified material according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step S1, weighing raw materials according to the proportion of each component of the 3D printing matte high-speed PETG modified material, adding them into a high-speed mixer, and mixing at a high speed for 5min-10min to obtain a mixture; Step S2, adding the mixture into a hopper of a twin-screw extruder, and melting, plasticizing, mixing, extruding, pelletizing, and drying the raw materials through the twin-screw extruder to obtain a 3D printing matte high-speed PETG modified material.

10. The method for preparing the 3D printing matte high-speed PETG modified material according to claim 9, characterized in that: The high-speed mixing is performed for 5 minutes to 10 minutes, and the raw materials are melted at a temperature of 190° C. to 230° C. by a twin-screw extruder.

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