Low-density heat-conducting and conductive polylactic acid 3D printed material as well as preparation method and application thereof

A 3D printing, conductive polymer technology, applied in the direction of additive processing, etc., can solve the problem of no heat conduction or conduction, and achieve the effect of reducing weight, smooth surface, and conductive specific gravity

Active Publication Date: 2017-10-24
广东波斯科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, materials commonly used in FDM molding technology include polylactic acid, ABS, nylon, etc. Among them, polylactic acid is widely used in FDM printing because of its biodegradability and good printing effect; but the mainstream polylactic acid consumables in the market are made of different colors. , or to toughen polylactic acid, and has no special functions such as thermal conductivity or electrical conductivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 A low-density thermally conductive polylactic acid 3D printing material 1 and wire 1

[0045] A low-density, thermally and electrically conductive polylactic acid 3D printing material. The polylactic acid 3D printing material consists of the following parts by mass: 65g of polylactic acid, 30g of metal-plated hollow glass beads, 0.5g of antioxidant, and 4g of dispersant , Nucleating agent 0.5g.

[0046] Wherein, the molecular weight of the polylactic acid is 80,000, and the density of the metal-plated hollow glass beads is 0.1 g / cm 3 , The particle size is 10-20 μm, and the sphericity of the metal-plated hollow glass beads is 95%;

[0047] Add the dried polylactic acid, metal-plated hollow glass beads, antioxidant, dispersant and nucleating agent into the high-speed mixer, mix at high speed for 3 minutes, and add the mixed materials into the barrel of the single-screw extruder. Extrusion and mixing at 180°C, air drying, and pelletizing to obtain polylactic acid pell...

Embodiment 2

[0049] Example 2 A low-density thermally conductive polylactic acid 3D printing material 2 and wire 2

[0050] A low-density, thermally and electrically conductive polylactic acid 3D printing material. The polylactic acid 3D printing material consists of the following parts by mass: 30g polylactic acid, 10g metal-plated hollow glass beads, 0.5g antioxidant, and 3g dispersant , 0.1g nucleating agent.

[0051] Wherein, the molecular weight of the polylactic acid is 20000, and the density of the metal-plated hollow glass beads is 0.05g / cm 3 , The particle size is 80-100 μm, and the sphericity rate of the metal-plated hollow glass beads is 95%.

Embodiment 3

[0052] Example 3 A low-density, thermally and electrically conductive polylactic acid 3D printing material 3 and wire 3

[0053] A low-density, thermally and electrically conductive polylactic acid 3D printing material. The polylactic acid 3D printing material is composed of the following parts by mass: 90g of polylactic acid, 50g of metal-plated hollow glass beads, 3g of antioxidant, 7g of dispersant, Nucleating agent 1g.

[0054] Wherein, the molecular weight of the polylactic acid is 100,000, and the density of the metal-plated hollow glass beads is 0.2g / cm 3 , The particle size is 5-10 μm, and the sphericity of the metal-plated hollow glass beads is 95%.

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Abstract

The invention relates to a low-density heat-conducting and conductive polylactic acid 3D printed material as well as a preparation method and application thereof. The polylactic acid 3D printed material is prepared from the following components in parts by weight: 30-90 parts of polylactic acid, 20-50 parts of metalized hollow glass microspheres, 0.5-3 parts of an antioxidant, 3-7 parts of a dispersing agent and 0.1-1 part of a nucleating agent, wherein the molecular weight of the polylactic acid is 20,000-150,000; the density of the metalized hollow glass microspheres is 0.05-0.5g/cm<3>, the particle sizes are 5-100 microns and the spherical rate of the metalized hollow glass microspheres is greater than 90%. Various raw materials are mixed and added to a single-screw extruder to be extruded and pelletized to obtain the low-density heat-conducting and conductive polylactic acid 3D printed material. The polylactic acid 3D printed material has low density, heat-conducting property and conductivity, and can meet the requirements of the market on a special FDM material with high heat-conducting property and conductivity and low specific gravity.

Description

Technical field [0001] The invention relates to the field of 3D printing materials, in particular to a low-density thermally conductive polylactic acid 3D printing material, and a preparation method and application thereof. Background technique [0002] The "Fused Deposition Modeling" (Fused Deposition Modeling, FDM) rapid prototyping technology uses plastic materials to melt at high temperatures and uses a computer to control the layer-by-layer accumulation and molding. This technology can be used to form parts of almost any geometric shape, including various complex-shaped molds, industrial parts, and prototypes required in industrial production. [0003] The "fused deposition" rapid prototyping technology can be applied to a wide range of polymer materials, including low temperature resistant materials (TPU, EVA, rubber, silicone rubber), commonly used polymer materials (PP, PE, ABS), high temperature resistant materials (PC, PA, PEEK, PI, PEI), biodegradable polymer materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K9/02C08K7/28B33Y70/00
CPCB33Y70/00C08K7/28C08K9/02C08K2201/003C08L2201/04C08L2203/20C08L2205/24C08L67/04
Inventor 雷周桥刘鹏周虎黎泽顺卢俊文
Owner 广东波斯科技股份有限公司
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