Preparation method of polylactic acid material for 3D (three-dimensional) printing

A polylactic acid material and 3D printing technology, applied in the field of 3D printing material preparation, can solve the problems of backward technical methods and single equipment, and achieve the same cooling shrinkage rate, convenient operation and simple production process.

Active Publication Date: 2014-03-26
ZHONGSHAN GREATSIMPLE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented describes an improved way to modify or improve properties of materials like plastic (polylactide) without losing their effectiveness due to factors such as heat exposure or mechanical impact. By applying these techniques onto specific areas inside the polymer matrix they change its characteristics significantly. These modifications make them stronger than unmodified versions while maintaining good physical/mechanical qualities.

Problems solved by technology

This patented describes various ways to modify thermoplastic compositions made up of specific types of mono acids called Polylact Acid™, PEEK®, PAMAC Nanocomposites, SPAG, TLCP, VEZrP, EBGA, Gamma Delta Amber Chemistry) type copolymers containing aliphatic ammonia groups instead of rigorous chemicals like phthalic acid. These modifications help prevent warping issues when forming thin layers due to differences between crystal structures and thermal expansion behavior at varying temperatures. Additionally, these techniques involve mixing multiple components together without causing phase separation, allowing them to mix uniformly throughout the composition while maintaining their original shape after being coated onto substrates.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Add 10 parts by weight of nano sepiolite fiber, 0.5 parts by weight of titanate coupling agent, and an appropriate amount of deionized water into the reactor, at a temperature of 60°C and a stirring speed of 300r / min, Ultrasonic treatment is used to react for 1 hour to discharge the material, dry, and grind to obtain a nano-inorganic toughening agent treated by surface organic modification;

[0026] 2) Add the nano inorganic toughening agent obtained in step 1) with 85 parts by weight of polylactic acid, 3 parts by weight of aliphatic dibasic acid ester, and 3 parts by weight of triethylhexyl phosphoric acid In the planetary ball mill, grind, disperse, and mix at a speed of 300r / min for 1h to obtain a mixture;

[0027] 3) The mixture obtained in step 2) is mixed and extruded with a twin-screw extruder to granulate, and the residence time of the material in the extruder is 5 minutes. The screw diameter of the twin-screw extruder is 75mm, the aspect ratio is 52:1, the...

Embodiment 2

[0032]1) Add 25 parts by weight of nano-brucite fibers, 2 parts by weight of organic complex coupling agent, and an appropriate amount of deionized water into the reactor, and at a temperature of 60°C and a stirring speed of 200r / min , using ultrasonic treatment to react for 2 hours, discharging, drying, and grinding to obtain a nano-inorganic toughening agent treated by surface organic modification;

[0033] 2) The nano-inorganic toughening agent obtained in step 1) with surface organic modification treatment, 60 parts by weight of polylactic acid, 3 parts by weight of benzoic acid ester, and 5 parts by weight of sodium lauryl sulfate were added to the In a planetary ball mill, grind, disperse, and mix at a speed of 400r / min for 2h to obtain a mixture;

[0034] 3) The mixture obtained in step 2) is mixed and extruded into pellets with a twin-screw extruder, and the residence time of the material in the extruder is 6 minutes. The screw diameter of the twin-screw extruder is 7...

Embodiment 3

[0039] 1) Add 15 parts by weight of nano-calcium carbonate whiskers, 1 part by weight of aluminum acid compound coupling agent, and an appropriate amount of deionized water into the reactor, at a temperature of 60°C and a stirring speed of 150r / min, Ultrasonic treatment is used to react for 1 hour to discharge the material, dry, and grind to obtain a nano-inorganic toughening agent treated by surface organic modification;

[0040] 2) Add the surface organically modified nano-inorganic toughening agent obtained in step 1), 70 parts by weight of polylactic acid, 2 parts by weight of citric acid ester, and 2 parts by weight of methyl amyl alcohol into a planetary ball mill In the process, grind, disperse, and mix at a speed of 350r / min for 1h to obtain a mixture;

[0041] 3) The mixture obtained in step 2) is mixed and extruded into pellets with a twin-screw extruder, and the residence time of the material in the extruder is 8 minutes. The screw diameter of the twin-screw extrud...

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PUM

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Abstract

The invention discloses a preparation method of a polylactic acid material for 3D (three-dimensional) printing. The polylactic acid material is toughened and modified by an inorganic nano material. The method comprises the steps as follows: firstly, surface organic modification is performed on a coupling agent for a nano inorganic toughening agent with an ultrasonic treatment technology, then the modified nano inorganic toughening agent, polylactic acid, a plasticizer and a dispersing agent are ground, dispersed and mixed, and finally, the toughened and modified polylactic acid material applicable to a 3D printing technology is prepared through an extruding granulation and drawing technology. According to the method, defects that existing polylactic acid materials for the 3D printing are poor in toughness and processability are overcome, and the method is simple to operate and capable of facilitating industrial production.

Description

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Claims

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Application Information

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Owner ZHONGSHAN GREATSIMPLE TECH CO LTD
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