Polylactic acid modified material for 3D printing, printing filament and preparation method thereof

A technology of 3D printing and modified materials, applied in the direction of additive processing, etc., can solve the problems of fine parts collapse, slow material hardening speed, low glass transition temperature, etc.

Active Publication Date: 2021-05-28
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polylactic acid modified material for 3D printing, printing filament and preparation method thereof
  • Polylactic acid modified material for 3D printing, printing filament and preparation method thereof
  • Polylactic acid modified material for 3D printing, printing filament and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 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

[0057]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

[0059] 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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a 3D printing polylactic acid modified material, a printing thread and a preparation method thereof, which mainly solves the problem of wrinkled structure in PLA material printing and the warping problem caused by PC modification in the prior art, through The polylactic acid modified material for 3D printing is used, and the material includes the following components in parts by mass: 1) 60 to 90 parts of polylactic acid; 2) 10 to 40 parts of polycarbonate; 3) 0.1 to 5.0 parts of fat The technical solution of aromatic copolyester solves this problem well and 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. [0002] technical background [0003] 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.] [0004] 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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L69/00C08L67/02B29B9/06
CPCB29B9/06B33Y70/00C08L67/04C08L2203/12C08L2205/03C08L69/00C08L67/02
Inventor 王洪学况军贾钦
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap