Unlock instant, AI-driven research and patent intelligence for your innovation.

Antistatic polycaprolactone resin powder for selective laser sintering and its preparation

A technology of polycaprolactone and laser sintering, applied in the field of polymer processing, can solve the problems of limited application, affecting processing performance and product performance, high volume resistance, etc., to achieve enhanced antistatic performance, moderate powder size, and particle size distribution uniform effect

Active Publication Date: 2018-08-17
CHINA PETROLEUM & CHEM CORP +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a polymer, PCL has a high volume resistance, which often affects its processing performance and product performance due to static electricity during use, limiting its application in medical devices, packaging materials, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Antistatic polycaprolactone resin powder for selective laser sintering and its preparation
  • Antistatic polycaprolactone resin powder for selective laser sintering and its preparation
  • Antistatic polycaprolactone resin powder for selective laser sintering and its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 100 parts by weight of polycaprolactone resin (melt index (190° C., 2.16 kg) is 30 g / 10 min) and 1000 parts by weight of acetone were placed in an autoclave. Introduce high-purity nitrogen to 0.2MPa; then raise the temperature to 70°C, and keep the temperature at this temperature for 60 minutes; after the end of the constant temperature, cool down to 20°C with cooling water at a rate of 0.5°C / min, and keep the temperature at this temperature for 60 minutes; continue Decrease to 0°C at a rate of 0.5°C / min. After adding 0.5 weight fraction of single-walled carbon nanotubes, 0.25 weight fraction of antioxidant 1330, and 0.5 weight fraction of calcium stearate in the obtained solid-liquid mixture, centrifuged and vacuum-dried to obtain suitable for selective laser Sintered antistatic polycaprolactone resin powder. The particle size of the obtained antistatic polycaprolactone resin powder is 25-90 μm, and the particle size distribution is D10=28 μm, D50=65 μm, D90=79 μm.

...

Embodiment 2

[0044] 100 parts by weight of polycaprolactone resin (melt index (190° C., 2.16 kg) is 50 g / 10 min) and 800 parts by weight of acetone were placed in an autoclave. Introduce high-purity nitrogen to 0.1MPa; then raise the temperature to 60°C, and keep the temperature at this temperature for 90 minutes; after the end of constant temperature, cool down to 30°C with cooling water at a rate of 0.2°C / min, and hold at this temperature for 90 minutes; continue Decrease to 5°C at a rate of 0.2°C / min. After adding 5 weight fractions of superconducting carbon black, 0.5 weight fractions of antioxidant 1330, and 1 weight fractions of zinc stearate into the obtained solid-liquid mixture, it was centrifuged and vacuum-dried to obtain suitable for selective laser sintering. Antistatic polycaprolactone resin powder. As measured by a laser particle size analyzer, the particle size of the antistatic polycaprolactone resin powder obtained in this example is 15-85 μm, and the particle size distr...

Embodiment 3

[0047] 100 parts by weight of polycaprolactone resin (melt index (190° C., 2.16 kg) is 50 g / 10 min) and 1200 parts by weight of acetone were placed in an autoclave. Introduce high-purity nitrogen to 0.3MPa; then raise the temperature to 80°C, and keep the temperature at this temperature for 30 minutes; after the end of the constant temperature, cool down to 10°C with cooling water at a rate of 0.1°C / min, and keep the temperature at this temperature for 30 minutes. After adding the conductive carbon black of 2.5 weight fractions and the double-walled carbon nanotubes of 3 weight fractions, the antioxidant 1330 of 0.3 weight fractions, and the nano silicon dioxide of 0.75 weight fractions in the obtained solid-liquid mixture, centrifugation and vacuum After drying, an antistatic polycaprolactone resin powder suitable for selective laser sintering is obtained. As measured by a laser particle size analyzer, the particle size of the antistatic polycaprolactone resin powder obtained...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melt flow indexaaaaaaaaaa
particle diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of antistatic polycaprolactone resin powder for selective laser sintering. The method comprises the following steps: a) dissolving polycaprolactone resin in a ketone or ether organic solvent at a heating temperature to form a polycaprolactone resin solution, b) cooling the polycaprolactone resin solution obtained in step a) to precipitate out solid, and c) adding an assistant to a solid-liquid mixture obtained in step b) for uniform mixing, and performing drying, wherein the assistant comprises an antistatic agent, an antioxidant and a powder separant. The method is simple and easy to operate, provides both a sintering feed with excellent processability for the selective laser sintering and a new direction for processing and application of the functional polycaprolactone resin. The invention further provides antistatic polycaprolactone resin powder prepared according to the method and a selective laser sintering method by taking the antistatic polycaprolactone resin powder as a powder sintering raw material.

Description

technical field [0001] The invention relates to the technical field of polymer processing, in particular to an antistatic polycaprolactone 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 has a shor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08K7/24C08K3/04C08K3/36C08K5/098C08K3/26C08K3/22C08J3/11B29C67/04
Inventor 初立秋刘建叶张师军权慧徐萌徐耀辉张琦杨庆泉白弈青侴白舸
Owner CHINA PETROLEUM & CHEM CORP