Low-melting-point high-flowability PETG modified 3D printing material and preparation method thereof

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By adding specific components to PETG material and preparing it using the dispersion masterbatch method, the problems of insufficient melt flowability and heat distortion temperature of PETG material were solved, realizing the preparation of low-melting-point, high-flowability PETG modified material, thus improving the success rate of 3D printing and material performance.

CN122167967APending Publication Date: 2026-06-09HENAN YUANHONG POLYMER NEW MATERIAL CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: HENAN YUANHONG POLYMER NEW MATERIAL CO LTD
Filing Date: 2026-04-30
Publication Date: 2026-06-09

AI Technical Summary

Technical Problem

In 3D printing, PETG material suffers from problems such as low melt flowability, high printing temperature leading to throat aging and nozzle clogging, and insufficient heat distortion temperature, which affects the printing success rate and model quality.

Method used

By introducing components such as polybutylene terephthalate, green plasticizer epoxidized soybean oil, nano talc powder, and acrylate core-shell toughening agent, a low-melting-point, high-flowability PETG modified material is prepared. The mixture is then mixed and melt-extruded using the dispersion masterbatch method to form a uniform premixed powder, which reduces melt viscosity and improves material toughness.

Benefits of technology

This approach achieves low melting point and high fluidity in PETG material, reduces printing temperature, minimizes throat aging and nozzle clogging, improves printing success rate and material toughness, and enhances thermal deformation capability.

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Abstract

The application discloses a low-melting-point high-fluidity PETG modified 3D printing material and a preparation method thereof, and belongs to the technical field of 3D printing materials.The material comprises the following components in parts by weight: PETG 60-75 parts, polybutylene terephthalate 8-10 parts, green plasticizer 3-8 parts, toughening agent 5-10 parts, inorganic nano filler 3-8 parts and processing aid 1-3 parts.The application adopts a pre-dispersed master batch method to prepare a functional master batch first and then blend the functional master batch with PETG to draw a wire, so that the problem of uneven dispersion and precipitation of liquid additives is effectively solved, and a wire with smooth surface and stable diameter is prepared.

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Claims

1. A low-melting-point, high-flowability PETG modified 3D printing material, characterized in that, By weight, it includes the following components: PETG: 60-75 parts, polybutylene terephthalate: 8-10 parts, green plasticizer: 3-8 parts, toughening agent: 5-10 parts, inorganic nanofiller: 3-8 parts, processing aid: 1-3 parts.

2. The low-melting-point, high-flowability PETG modified 3D printing material according to claim 1, characterized in that, The PETG is one or more of polyethylene terephthalate-1,4-cyclohexanediol ester or polyethylene terephthalate-neopentyl glycol ester.

3. The low-melting-point, high-flowability PETG modified 3D printing material according to claim 1, characterized in that, The green plasticizer is one or more of epoxidized soybean oil or tributyl acetylglucosamine.

4. The low-melting-point, high-flowability PETG modified 3D printing material according to claim 1, characterized in that, The toughening agent is an acrylate core-shell toughening agent.

5. The low-melting-point, high-flowability PETG modified 3D printing material according to claim 1, characterized in that, The inorganic nanofiller is nano-talc powder or nano-wollastonite that has been surface-treated with a silane coupling agent, and its average particle size is ≤1.5μm.

6. The low-melting-point, high-flowability PETG modified 3D printing material according to claim 1, characterized in that, The processing aids are antioxidants and lubricants. The antioxidant is a compound of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] and tris(2,4-di-tert-butylphenyl)phosphite in a mass ratio of 1:1 to 1:

2. The lubricant is one or more of ethylene bis-stearamide or pentaerythritol stearate.

7. A method for preparing a low-melting-point, high-flowability PETG modified 3D printing material as described in any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Preparation of functional masterbatch: The inorganic nanofiller, green plasticizer, toughening agent, processing aid and polybutylene terephthalate according to the formula are mixed and then melt extruded and granulated to obtain the functional masterbatch. S2. Material preparation: The functional masterbatch obtained in step S1 is mixed with PETG according to the formula, and the mixture is melt-extruded, cooled, and drawn to obtain the modified PETG material.

8. The preparation method according to claim 7, characterized in that, In step S1, the mixing is carried out in a high-speed mixer with a mixing speed of 800~1500 r / min and a mixing time of 10~20 min.

9. The preparation method according to claim 7, characterized in that, In step S1, the melt extrusion is carried out in a twin-screw extruder at a processing temperature of 210~230℃.

10. The preparation method according to claim 7, characterized in that, In step S2, the melt extrusion is carried out in a fiber extruder at a processing temperature of 190~215℃.