Toughened polylactic acid capable of being used for rapid forming and preparation method thereof

A polylactic acid and toughening technology, applied in the direction of additive processing, etc., can solve the problems of complex process, unfavorable industrial production, affecting the biodegradability of polylactic acid, etc., achieving simple preparation process, good surface gloss, and overcoming brittle fracture. Effect

Inactive Publication Date: 2016-06-22
江苏永盛三维打印新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above method can overcome the brittleness of polylactic acid and improve the impact resistance of the material, but the high content of added components affects the biodegradability of polylactic acid or the complex process is not conducive to industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Dry 97 parts of polylactic acid and 3 parts of ethylene-acrylate-glycidyl methacrylate at 65°C for 3 to 4 hours respectively, add to a high-speed mixer after drying, and add 0.1 part of antioxidant 1010 at the same time, in the high-speed mixer After 3 minutes of mixing a premix was obtained. The parts mentioned are all calculated by mass parts;

[0027] Put the premixed material obtained above into the feeding port of the twin-screw extruder, the barrel temperature is 165-195°C, the die head temperature is 190°C, the screw speed is 200 rpm, and the twin-screw length-to-diameter ratio is 40:1. extrusion granulation;

[0028] The obtained toughened polylactic acid had a tensile strength of 62 MPa and an elongation at break of 17.5%.

Embodiment 2

[0030] Dry 98.5 parts of polylactic acid and 1.5 parts of ethylene-acrylate-glycidyl methacrylate at 65°C for 3 to 4 hours, add to the high-speed mixer after drying, and add 0.1 part of antioxidant 1010 at the same time, and put them in the high-speed mixer After 3 minutes of mixing a premix was obtained. The parts mentioned are all calculated by mass parts;

[0031] Put the premixed material obtained above into the feeding port of the twin-screw extruder, the barrel temperature is 165-195°C, the die head temperature is 190°C, the screw speed is 200 rpm, and the twin-screw length-to-diameter ratio is 40:1. extrusion granulation;

[0032] The obtained toughened polylactic acid had a tensile strength of 62 MPa and an elongation at break of 14.5%.

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Abstract

The invention discloses toughened polylactic acid capable of being used for rapid forming and a preparation method thereof. The modified polylactic acid is prepared through the method which includes the steps that polylactic acid and a toughening agent are dried respectively and then fully mixed in proportion, and the toughened modified polylactic acid is obtained after melt blending and extrusion. The modified polylactic acid can overcome the defect that polylactic acid is prone to brittle failure, the transparency and tensile strength of polylactic acid are not affected, the process is simple, implementation is easy, and the toughened polylactic acid is suitable for being used as a 3D printing consumable.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a toughened polylactic acid and a preparation method thereof, in particular to a toughened polylactic acid for rapid prototyping and a preparation method thereof. Background technique [0002] 3D printing technology refers to the technology of generating three-dimensional entities by adding materials layer by layer through continuous physical layer superposition, which is different from traditional material removal processing, and is also called additive manufacturing (AM). At present, 3D printing technology is mainly used in the fields of product prototype, mold manufacturing, artistic creation and medical equipment. 3D printing technology can greatly improve the efficiency and precision of manufacturing. [0003] PLA (polylactic acid) is a new type of green plastic that is completely biodegradable. It not only has good biocompatibility and biodegradability, but also has mechanica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L23/08C08K5/134B33Y70/00
CPCC08L67/04B33Y70/00C08L2201/10C08L23/0869C08K5/134
Inventor 赵继东石洪星王文徐华陶建军陶志均张颖莉
Owner 江苏永盛三维打印新材料有限公司
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