Carbon fiber/PET composite material as well as preparation method and application thereof

A composite material and carbon fiber technology, applied in the direction of additive processing, etc., can solve the problems of low mechanical strength, poor processability, and excessive fluidity of the parts, and achieve the effects of smooth surface, reduced addition, and cost savings

Pending Publication Date: 2021-03-12
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PET is directly used for 3D printing, and there are defects such as poor processability and too fast fluidity in the process of mixing and extrusion into filaments, and even after printing, the mechanical strength of the parts is not high

Method used

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  • Carbon fiber/PET composite material as well as preparation method and application thereof
  • Carbon fiber/PET composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides a carbon fiber / PET composite material for FDM printing, comprising the following components by weight:

[0039] 80 parts of PET, 20 parts of PBT, 7 parts of compatibilizer (AX8900), 20 parts of toughening agent A (EBA) The preparation method of the carbon fiber / PET composite material for FDM printing in this embodiment includes the following steps:

[0040] Vacuum dry PET, PBT, compatibilizer and toughener respectively;

[0041] The mixture is mixed and extruded by twin-screw, and pelletized on a pelletizer to obtain modified pellets. The temperature of each section of the twin-screw extruder is set in turn: 170°C in the first zone, 180°C in the second zone, and 200°C in the third zone. The fourth zone is 245°C, the fifth zone is 245°C, the sixth zone is 245°C, the seventh zone is 250°C, the eighth zone is 250°C, the ninth zone is 250°C, the machine head is 240°C, the main engine speed is 300r / min, and the feeding frequency is 15r / min;

[0042]...

Embodiment 2

[0044] This embodiment provides a carbon fiber / PET composite material for FDM printing, comprising the following components by weight:

[0045] 70 parts of PET, 30 parts of PBT, 10 parts of compatibilizer (AX8900), 15 parts of toughening agent B (EMA)

[0046] The preparation method of the carbon fiber / PET composite material for FDM printing in this embodiment comprises the following steps:

[0047] Vacuum dry PET, PBT, compatibilizer and toughener respectively;

[0048] The mixture is mixed and extruded by twin-screw, and pelletized on a pelletizer to obtain modified pellet H3. The temperature of each section of the screw extruder is set in turn: 170°C in the first zone, 180°C in the second zone, 200°C in the third zone, The fourth zone is 240°C, the fifth zone is 240°C, the sixth zone is 245°C, the seventh zone is 250°C, the eighth zone is 250°C, the ninth zone is 250°C, the machine head is 240°C, the main engine speed is 300r / min, and the feeding frequency is 15r / min;

[...

Embodiment 3

[0051] This embodiment provides a carbon fiber / PET composite material for FDM printing, comprising the following components by weight:

[0052] 80 parts of PET, 20 parts of PBT, 4 parts of compatibilizer (AX8900), 15 parts of toughening agent A (EBA), 0.5 parts of nucleating agent A (talc powder)

[0053] The preparation method of the carbon fiber / PET composite material for FDM printing in this embodiment comprises the following steps:

[0054] Vacuum dry PET, PBT, chopped carbon fiber, compatibilizer, toughening agent and nucleating agent respectively;

[0055] The toughening agent, compatibilizer and nucleating agent are weighed according to the formula, and mixed at high speed in a high-speed mixer, and the heat generated by the high-speed mixing process is used to coat the nucleating agent on the compatibilizer to obtain a mixed masterbatch H1;

[0056] Mix the mixed masterbatch H1 in step B with PET and PBT after weighing to obtain the mixture H2;

[0057] The mixture H2 ...

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Abstract

The invention relates to a carbon fiber / PET composite material as well as a preparation method and application thereof. The carbon fiber / PET composite material is prepared from the following raw materials in parts by weight: 60-90 parts of polyethylene glycol terephthalate, 10-40 parts of polybutylene terephthalate, 5-20 parts of chopped carbon fibers, 1-15 parts of a compatilizer, 10-30 parts ofa flexibilizer, 0.1-1 part of a nucleating agent and 0.1-10 part of other assistants. According to the carbon fiber / PET composite material, the nucleating agent adheres to the compatilizer and the flexibilizer, dispersion of the nucleating agent is facilitated, then the nucleating agent, PET, PBT, chopped carbon fibers and other auxiliaries are mixed according to the formula and then added into adouble-screw extruder to be extruded and granulated, modified granules are dried and then extruded through a single-screw extruder, and the wire suitable for the FDM printer is obtained. And the prepared wire and the printed product have smooth and flat surfaces, and do not warp or deform in the printing process. The nucleating agent can be used for well adhering the heated compatilizer, so that the nucleating agent can be well dispersed in the subsequent mixing process, the addition of a dispersing agent can be reduced, and the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of materials for 3D printing, and in particular relates to a carbon fiber / PET composite material and its preparation method and application. Background technique [0002] Fused deposition technology (FDM) has the highest share in the 3D printing market, and its rapid prototyping and low cost are popular in industries such as family, education, and cultural creation. However, at present, there are insufficient types of wire materials, and there are certain performance defects, which cannot meet the needs of more users, thus restricting the development of FDM printing. Therefore, there is an urgent need for new functional wires. [0003] In recent years, research on FDM printing of fiber-composite thermoplastic material wires has become a hot topic. Composite materials for FDM 3D printing mainly include fiber composite PLA and ABS. There are also carbon fiber (CF) / nylon and carbon fiber / polycarbonate (PC) on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K7/06B33Y70/10
CPCC08L67/02B33Y70/10C08K2201/003C08K2201/004C08L2205/035C08L2205/025C08L2205/08
Inventor 顾哲明王晨蕾乔雯钰胡浩杨飏
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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