Glass fiber reinforced polylactic acid resin powder for selective laser sintering, and preparation thereof

A technology of polylactic acid resin and laser sintering, which is applied in processing and manufacturing, additive processing, solid material additive processing, etc., can solve the problems of poor physical and mechanical properties and limitations, and achieve small dimensional errors, fewer holes, and simple operation steps Effect

Active Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its poor physical and mechanical properties limit its application

Method used

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  • Glass fiber reinforced polylactic acid resin powder for selective laser sintering, and preparation thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] 100 parts by weight of 1510 brand polylactic acid resin (96% optical purity) and 1000 parts by weight of acetone were placed in a high-pressure reactor. Introduce high-purity nitrogen to 0.2MPa; then raise the temperature to 135°C, and keep the temperature at this temperature for 60 minutes; after the end of constant temperature, cool down to 100°C with cooling water at a rate of 1.0°C / min, and keep the temperature at this temperature for 60 minutes; continue Decrease to 25°C at a rate of 1.0°C / min, and keep at this temperature for 60 minutes. After adding 10 weight fractions of ultra-short glass fibers with a diameter of 5 μm and a length of 150 μm, 0.25 weight fractions of antioxidant 1330, and 0.5 weight fractions of calcium stearate to the obtained solid-liquid mixture, centrifuged and vacuum dried to obtain Glass fiber reinforced polylactic acid resin powder suitable for selective laser sintering. The particle size of the glass fiber reinforced polylactic acid res...

Embodiment 2

[0040] 100 parts by weight of 4032D grade polylactic acid resin (98% optical purity) and 800 parts by weight of acetone were placed in an autoclave. Introduce high-purity nitrogen to 0.1MPa; then raise the temperature to 140°C, and keep the temperature at this temperature for 30 minutes; after the end of constant temperature, cool down to 20°C with cooling water at a rate of 1.0°C / min, and keep at 20°C for 60 minutes. After adding 25 weight fractions of ultra-short glass fibers with a diameter of 10 μm and a length of 250 μm, 0.5 weight fraction of antioxidant 1330, and 1 weight fraction of zinc stearate to the obtained solid-liquid mixture, centrifuged and vacuum dried to obtain Glass fiber reinforced polylactic acid resin powder suitable for selective laser sintering. The particle size of the glass fiber reinforced polylactic acid resin powder is 30-100 μm, and the particle size distribution is D10=44 μm, D50=58 μm, D90=88 μm.

Embodiment 3

[0042] 100 parts by weight of 2002D polylactic acid resin (96% optical purity) and 1200 parts by weight of acetone were placed in an autoclave. Introduce high-purity nitrogen to 0.3MPa; then raise the temperature to 130°C, and keep the temperature at this temperature for 90 minutes; after the constant temperature is completed, cool down to 25°C with cooling water at a rate of 0.1°C / min, and keep the temperature at this temperature for 90 minutes. After adding 10 weight fractions of ultra-short glass fibers with a diameter of 15 μm and a length of 200 μm, 0.25 weight fractions of antioxidant 1330, and 0.75 weight fractions of nano-silica to the obtained solid-liquid mixture, centrifuged and vacuum dried to obtain Glass fiber reinforced polylactic acid resin powder suitable for selective laser sintering. The particle size of the glass fiber reinforced polylactic acid resin powder is 20-120 μm, and the particle size distribution is D10=30 μm, D50=67 μm, D90=105 μm.

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Abstract

The present invention provides a preparation method of glass fiber reinforced polylactic acid resin powder for selective laser sintering. The preparation method comprises: a) dissolving a polylactic acid resin in a ketone and / or ether organic solvent at a heating temperature to obtain a polylactic acid resin solution; b) cooling the polylactic acid resin solution obtained in the step a) to precipitate the solid; and c) adding an auxiliary agent to the solid-liquid mixture obtained in the step b), uniformly mixing, and drying to obtain the powder, wherein the auxiliary agent comprises ultra-short glass fibers, an antioxidant and a powder isolation agent. According to the present invention, the method is simple and easy to operate, the sintering raw material having excellent processing performance is provided for the selective laser sintering, and the new direction is provided for the processing and application of the functional polylactic acid resin. The invention further provides the glass fiber reinforced polylactic acid resin powder prepared according to the method, and a selective laser sintering method using the glass fiber reinforced polylactic acid resin powder as the sintering powder raw material.

Description

technical field [0001] The invention relates to the technical field of polymer processing, in particular to a glass fiber reinforced polylactic acid resin powder for selective laser sintering, a preparation method thereof and an application in selective laser sintering. Background technique [0002] Selective Laser Sintering (SLS) technology is a rapid prototyping technology, which is currently the most widely used and most promising technology in additive manufacturing technology, showing a rapid development trend in recent years. SLS technology is a technology in which the computer first scans the three-dimensional entity, and then selectively melts and sinters the material powder pre-laid on the workbench or parts through high-intensity laser irradiation, and then realizes layer-by-layer molding. . SLS technology has a high degree of design flexibility, can manufacture accurate models and prototypes, can form parts with reliable structures that can be used directly, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K7/14C08J3/14B29C64/153B33Y70/00
Inventor 初立秋刘建叶张丽英张师军邵静波郭鹏高达利张琦徐凯侴白舸
Owner CHINA PETROLEUM & CHEM CORP
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