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Polylactic acid modified material for 3D printing, printing wire, and preparation methods of polylactic acid modified material and printing wire

A 3D printing and modified material technology, applied in the direction of additive processing, etc., can solve the problems of low impact strength, low glass transition temperature, and collapse of fine parts, and achieve the effect of low warpage

Active Publication Date: 2019-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although PLA has a broad application space in the field of 3D printing, the material also has obvious defects: low glass transition temperature and slow crystallization speed, which makes the material harden slowly during the printing process, and it is difficult to print complex and fine parts. It is easy to collapse and form a wrinkled structure; in addition, PLA also has the problems of high brittleness and low impact strength, which limit the application of PLA.
However, PC itself has a serious warping problem in 3D printing. The introduction of PC into PLA will inevitably bring about a certain degree of warping, especially when printing large parts, which will seriously affect the accuracy of printed parts.

Method used

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  • Polylactic acid modified material for 3D printing, printing wire, and preparation methods of polylactic acid modified material and printing wire
  • Polylactic acid modified material for 3D printing, printing wire, and preparation methods of polylactic acid modified material and printing wire
  • Polylactic acid modified material for 3D printing, printing wire, and preparation methods of polylactic acid modified material and printing wire

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Experimental program
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Effect test

Embodiment 1

[0054] The polylactic acid (PLA) used in the present invention is produced by American NatureWorks LLC company, and the trade mark is IngeoTMPLA 4032D. Polycarbonate (PC) used in the present invention is produced by Saudi Basic Industries Corporation, and the trade mark is LEXAN TM Resin HF1130-111. Polybutylene adipate terephthalate (PBAT) is produced by BASF in Germany, the brand is F BX-7011. The three particles were first dried in a vacuum oven at 60°C for 4 hours to remove moisture. Finally, according to the mass parts of 70 parts of PLA, 27 parts of PC, and 3 parts of PBAT, manual stirring and mixing were carried out, and the mixing time was 20 minutes. PolyLab HAAKE Rheomex OS PTW16 co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio L / D=40) of American ThermoFisher Technology Co., Ltd. was used to extrude and granulate. The extruder has 11 sections from the feed port to the die, numbered 1-11, and the first section only plays the role o...

Embodiment 2

[0056]The PLA, PC and PBAT particles were first dried in a vacuum oven at 60°C for 4 hours to remove moisture. Finally, according to the mass parts of 60 parts of PLA, 38 parts of PC, and 2 parts of PBAT, manual stirring and mixing were carried out, and the mixing time was 20 minutes. PolyLab HAAKE Rheomex OS PTW16 co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio L / D=40) of American ThermoFisher Technology Co., Ltd. was used to extrude and granulate. The extruder has 11 sections from the feed port to the die, numbered 1-11, and the first section only plays the role of feeding and cannot be heated. The temperatures of sections 2-11 of the extruder are respectively: 210°C, 220°C, 230°C, 230°C, 230°C, 230°C, 230°C, 230°C, 230°C and 220°C, and the screw speed is set at 200 rpm. In steady operation, the torque is 40-60% of the maximum value. The extruder is equipped with a circular die with a diameter of 3mm. After the spline is extruded from the di...

Embodiment 3

[0058] Three kinds of particles of PLA, PC and PBAT were dried in a vacuum oven at 60°C for 4 hours in advance to remove moisture. Finally, according to the mass parts of 70 parts of PLA, 28.5 parts of PC, and 1.5 parts of PBAT, manual stirring and mixing were carried out, and the mixing time was 20 minutes. PolyLab HAAKE Rheomex OS PTW16 co-rotating twin-screw extruder (screw diameter 16 mm, length-to-diameter ratio L / D=40) of American ThermoFisher Technology Co., Ltd. was used to extrude and granulate. The extruder has 11 sections from the feed port to the die, numbered 1-11, and the first section only plays the role of feeding and cannot be heated. The temperatures of sections 2-11 of the extruder are respectively: 210°C, 220°C, 230°C, 230°C, 230°C, 230°C, 230°C, 230°C, 230°C and 220°C, and the screw speed is set at 200 rpm. In steady operation, the torque is 40-60% of the maximum value. The extruder is equipped with a circular die with a diameter of 3mm. After the spline...

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Abstract

The invention discloses a 3D printing polylactic acid modified material, a printing wire, and preparation methods of the polylactic acid modified material and the printing wire. In the prior art, theprinting with the PLA material easily causes the wrinkle structure and the warpage can be caused by the PC modification. A purpose of the present invention is to mainly solve the problems in the priorart. According to the present invention, the polylactic acid modified material for 3D printing comprises, by mass, 1) 60-90 parts of polylactic acid, 2) 10-40 parts of polycarbonate, and 3) 0.1-5.0 parts of aliphatic aromatic copolyester. With the technical scheme, the problems in the prior art can be well solved. The obtained product can be used in FDM 3D printing applications.

Description

technical field [0001] The invention belongs to the field of polymer materials, and specifically relates to a 3D printing modified polylactic acid material with good performance and a preparation method thereof. technical background [0002] 3D printing belongs to the additive technology of rapid prototyping technology. It is a technology based on digital model files to prepare 3D blocks by printing materials layer by layer. After nearly 30 years of development, 3D technology has been considered as one of the core technologies to change the way of laboratory and industrial production. Currently commonly used 3D printing technologies mainly include Stereolithography, Inkjet Printing, Selective Laser Sintering, and Fused Deposition Modeling. [Analytical Chemistry2014,86(7),3240-3253.] [0003] As a commonly used 3D printing technology, fused deposition modeling mainly melts thermoplastics by heating, extruding them at the nozzle, and solidifying layer by layer on the base pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L69/00C08L67/02B29B9/06
CPCC08L67/04B29B9/06B33Y70/00C08L2203/12C08L2205/03C08L69/00C08L67/02B29B9/12B29B7/48B29B7/88B29B7/726B33Y10/00B29C64/118D01F6/92
Inventor 王洪学况军贾钦
Owner CHINA PETROLEUM & CHEM CORP
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