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High-melt-index PC composite material for 3D printing and preparation method thereof

A technology of 3D printing and composite materials, which is applied in the field of high-melting index PC composite materials and its preparation, can solve the problems of difficult wire diameter control, easy warping of printed products, and easy warping of printed products, so as to reduce unqualified The risk of warping, obvious warping, and the effect of warping improvement

Inactive Publication Date: 2020-08-04
四川鑫达企业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention overcomes the problems of high melt viscosity of PC material used as FDM 3D printing wire rod, difficulty in controlling wire rod diameter, and prone to warping of printed products, and provides a high-melting index PC composite 3D printing consumable, which can guarantee the mechanical properties of PC At the same time, the melt flow rate of PC materials can be improved to solve the problems of high printing temperature, poor melt fluidity and easy warping of printed products in the current market for PC 3D printing consumables. In order to solve the above technical problems, the technology adopted in this invention is Sichuan Xinda Enterprise The plan of the Group Co., Ltd. is as follows:

Method used

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  • High-melt-index PC composite material for 3D printing and preparation method thereof
  • High-melt-index PC composite material for 3D printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1（1）

[0011] Example 1 (1) Weigh the following raw materials by weight: 80 parts of polycarbonate, 15 parts of PETG, 4 parts of compatibilizer, 0.3 part of antioxidant, and 0.5 part of lubricant. The PC material was dried in a drying oven at 120 °C for 5 h, and the PETG material was dried at 70 °C for 6 h. (2) Add the polycarbonate, PETG, compatibilizer, antioxidant, and lubricant weighed in step (1) into a high-speed mixer, and mix for 2-4 minutes. (3) Place the mixed premix in a co-rotating twin-screw extruder for melt extrusion and granulation. The temperatures of the twin-screw barrel and head are: 220°C, 235°C, 245°C, 245°C, 245°C, 240°C; put the pellets into a single-screw extruder and extrude them into 1.75mm filaments for 3D printing. °C, 240 °C, 230 °C.

[0012] The performance of the PC composite material prepared in this example is compared with that of the PC material in the following table:

[0013] Table 1 Embodiment 1 and PC material performance contrast

[0014] ...

Embodiment 2

[0017] Example 2 (1) Weigh the following raw materials by weight: 70 parts of polycarbonate, 25 parts of PETG, 5 parts of compatibilizer, 0.3 part of antioxidant, and 0.5 part of lubricant. The PC material was dried in a drying oven at 120 °C for 5 h, and the PETG material was dried at 70 °C for 6 h. (2) Add the polycarbonate, PETG, compatibilizer, antioxidant, and lubricant weighed in step (1) into a high-speed mixer, and mix for 2-4 minutes. (3) Place the mixed premix in a co-rotating twin-screw extruder for melt extrusion and granulation. The temperatures of the twin-screw barrel and head are: 220°C, 230°C, 240°C, 240°C, 245°C, 240°C; put the pellets into a single-screw extruder and extrude them into 1.75mm filaments for 3D printing. °C, 240 °C, 230 °C.

[0018] The performance of the PC composite material prepared in this example is compared with that of the PC material in the following table:

[0019]

[0020] Table 2 Performance comparison between Example 2 and PC ...

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Abstract

The invention discloses a high-melt-index PC composite material for 3D printing and a preparation method thereof. The high-melt-index PC composite material is composed of the following components in parts by weight: 65 to 85 parts of PC, 15 to 35 parts of PETG, 2 to 5 parts of a compatilizer, 0.2 to 0.5 part of an antioxidant, and 0.3 to 1 part of a lubricant. A PETG material is added into a PC material; under the action of high temperature and shearing force, ester exchange reaction and chain slip diffusion are carried out between 1,4-cyclohexanedimethanol ester and polycarbonate; the molecular weight distribution of the PC material is widened, the acting force between molecular chains is weakened, the melt flow rate of the material is increased, the printing temperature of the PC consumable is reduced to about 250 DEG C, and the printing temperature range of a conventional FDM 3D printer is met. The internal stress of the material system is weakened, so that the warping phenomenon ofthe PC3D printing consumable product is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of 3D printing materials, and in particular relates to a high-melting-index PC composite material used in fused deposition modeling technology (FDM) and a preparation method thereof. Background technique [0002] 3D printing technology, also known as additive manufacturing technology, is a type of rapid prototyping technology that emerged in the 1980s. It is based on digital model files, using bondable materials such as metal or plastic, and printing The technique of constructing objects in a way. Common 3D printing technologies include fused deposition modeling (FDM), solidification forming (SLA), laminated solid manufacturing (LOM) and selective laser sintering (SLS). The most commonly used 3D printers are devices using FDM technology. At present, the materials used in FDM printers on the market mainly include ABS, PLA, etc. Compared with PLA, ABS materials will produce unpleasant odors and affect the en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L67/02B33Y70/00
CPCB33Y70/00C08L69/00C08L2205/05C08L67/02
Inventor 马占赵武学贾宇冲
Owner 四川鑫达企业集团有限公司
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