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Polylactic acid composite material used for three-dimensional printing and preparation method therefor

A composite material and three-dimensional printing technology, applied in the field of 3D printing manufacturing, can solve the problems of no significant change in thermal conversion characteristics, difficulty in printing high-precision products, large thermal shrinkage deformation, etc., to achieve excellent sliding performance, prevent deformation, and good viscoelasticity Effect

Active Publication Date: 2015-08-19
珠海金骆驼科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the above, the current blending modification of polylactic acid has improved its toughness by adding toughening materials, but the thermal conversion characteristics have not changed significantly. Because polylactic acid has a fixed melting point when heated, it directly transforms from solid to liquid. It is easy to flow when forming layer by layer, but it will solidify quickly when the temperature drops, so the thermal shrinkage deformation is large, and it is difficult to print high-precision products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1) Add 5 parts by weight of fine flaky aluminum powder and 2 parts by weight of surface modifier sorbitan stearate into the micronizer, set the temperature of the micronizer at 80°C, and disperse at a high speed of 1200rpm for 5 minutes. The fine metal powder clusters are fully dispersed, and then 0.2 parts by weight of hindered phenolic antioxidant tetrakis [methyl-β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol Antioxidant compounded with ester and hindered phenolic antioxidant tris(2,4-di-tert-butylphenyl) phosphite in a weight ratio of 1:1, continue to disperse for 3-5min to obtain active tablets shape fine metal powder;

[0043] 2) Add the active flaky fine metal powder obtained in step 1), 70 parts by weight of polylactic acid powder, and 0.5 parts by weight of polyethylene oxide into a high-speed mixer, and mix at 40°C for 10 minutes at a speed of 300rpm , then add 0.2 parts by weight of polypropylene wax to disperse and mix for 5 minutes, and ...

Embodiment 2

[0049] 1) Add 10 parts by weight of fine flaky zinc powder and 1.5 parts by weight of surface modifier sorbitan monopalmitate into the micronizer, set the temperature of the micronizer at 85°C, and disperse at a high speed of 1500rpm for 10 minutes. Fine metal powder clusters are fully dispersed, then add 0.2 parts by weight of hindered phenolic antioxidant tetrakis [methyl-β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and hindered phenolic antioxidant tris(2,4-di-tert-butylphenyl) phosphite in a weight ratio of 1:1, and continued to disperse for 4 minutes to obtain active sheet-like fine metal Powder;

[0050] 2) Add the active flaky fine metal powder obtained in step 1), 75 parts by weight of polylactic acid powder, and 1 part by weight of crystallization agent polyethylene oxide into a high-speed mixer. Mix for 15 minutes, then add 0.3 parts by weight of processing aid polyethylene wax to disperse and mix for 5 minutes, and discharge after the pro...

Embodiment 3

[0056] 1) Add 15 parts by weight of fine flaky zinc-aluminum alloy powder and 2 parts by weight of surface modifier sorbitan monooleate into the micronizer, set the temperature of the micronizer at 100°C, and disperse at a high speed of 1300rpm for 10 minutes , the flaky fine metal powder clusters are fully dispersed, and then add 0.3 parts by weight of hindered phenolic antioxidant tetrakis [methyl-β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate ] pentaerythritol ester and hindered phenolic antioxidant tris (2,4-di-tert-butylphenyl) phosphite compounded by weight ratio 1: 1 antioxidant compound and continue to disperse for 3min, to obtain active flake Fine metal powder;

[0057] 2) Add the active flaky fine metal powder obtained in step 1), 80 parts by weight of polylactic acid powder, and 0.5 parts by weight of crystallization agent polyethylene oxide into a high-speed mixer. Mix for 20 minutes, then add 0.2 parts by weight of processing aid N, N'-bisethylene stearic acid ...

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Abstract

The invention discloses a polylactic acid composite material used for three-dimensional printing. The polylactic acid composite material is characterized by comprising sheet-like micro metal powder, and being prepared from raw materials of the following components in parts by weight: 70-80 parts of polylactic acid, 5-15 parts of sheet-like micro metal powder, 1-2 parts of a surface modifier, 0.5-1 part of a crystallizing agent, 0.2-0.3 part of an antioxidant and 0.2-0.3 part of a processing aid. The sheet-like micro metal powder with flexibility and good thermal capacity is introduced into the polylactic acid, so that the thermal performance of the polylactic acid is changed by utilizing the thermal capacity of the sheet-like micro metal powder, and the polylactic acid is prevented from being quickly cooled to generate deformation. Especially, the sheet-like metal powder has good sliding property and flexibility, so that the flow uniformity and the toughness of the polylactic acid are improved, and the polylactic acid composite material is suitable for manufacturing a high-precision product by three-dimensional printing.

Description

technical field [0001] The invention belongs to the field of 3D printing manufacturing, specifically relates to a polylactic acid composite material used for 3D printing manufacturing, and further relates to a preparation method of the polylactic acid composite material. Background technique [0002] 3D printing technology is a rapid additive manufacturing technology that generates three-dimensional entities by increasing the accumulation of materials layer by layer. It not only overcomes the loss caused by traditional subtractive manufacturing, but also makes product manufacturing more intelligent, more accurate and more efficient. 3D printing manufacturing technology represents a new trend in the development of the world's manufacturing industry, and plays an important leading role in accelerating the development of advanced manufacturing and promoting industrial transformation and upgrading. With the development of high-end manufacturing, 3D printing manufacturing techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K13/06C08K9/04C08K7/00C08K3/08B29C47/92B29C67/24B33Y10/00B33Y70/00B29C48/92
Inventor 陈庆曾军堂
Owner 珠海金骆驼科技有限公司
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