Nylon conductive powder preparation method for laser sintering

A conductive powder and laser sintering technology, which is applied in the field of nylon conductive powder preparation for laser sintering, can solve problems such as separation, easy delamination, three-dimensional parts affecting conductive performance, and other properties, and achieve difficult phase separation, concentrated particle size distribution, Good electrical conductivity and other related properties

Active Publication Date: 2017-06-13
HUNAN FARSOON HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Selective laser sintering conductive nylon composite powder with mechanical mixing is easy to cause phase separation due to the different properties of conductive powder particles and nylon particles. During use, especially during the powder laying process, different materials are easy to delaminate, resulting in three-dimensional parts. Affects its conductivity and other properties due to unevenness

Method used

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  • Nylon conductive powder preparation method for laser sintering

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] Take 1000g of copper with an average particle size of 5 microns and 500g of an alcohol-water solution of potassium dodecyl phosphate, stir and mix evenly, filter, dry at 60°C for 4h, ball mill, and sieve to obtain surface-activated copper powder; The composition and mass percentage of the alcohol-water solution of potassium lauryl phosphate are: 85% ethanol, 10% distilled water, and 5% potassium dodecyl phosphate. Put 10Kg of PA1212 material, 100g of surface-activated copper powder, and 80Kg of ethanol into a 100L reaction kettle, feed high-purity nitrogen gas to a pressure of 0.3MPa, heat under continuous stirring to raise the temperature in the kettle to 150°C, and keep warm at this temperature 120min; then use cooling water to lower the temperature, so that the temperature in the kettle drops to 75℃ at a cooling rate of 0.8℃ / min, increase the flow rate of cooling water to lower the temperature in the kettle to room temperature, take out the material, centrifuge and dr...

Embodiment 2

[0027] Take 1000g of silver with an average particle size of 5 microns and 500g of alcohol-water solution of potassium dodecyl phosphate, stir and mix evenly, filter, dry at 60°C for 4 hours, ball mill and sieve to obtain surface-activated silver powder; ten of them The composition and mass percentage of the alcohol-water solution of dialkyl potassium phosphate are: 85% ethanol, 10% distilled water, and 5% potassium dodecyl phosphate. Put 10Kg of PA1212 material, 100g of surface-activated silver powder, and 80Kg of ethanol into a 100L reaction kettle, feed high-purity nitrogen gas to a pressure of 0.3MPa, heat under continuous stirring to raise the temperature in the kettle to 150°C, and keep at this temperature for 120min ; Then use cooling water to lower the temperature, so that the temperature in the kettle drops to 75℃ at a cooling rate of 0.8℃ / min, increase the flow rate of cooling water to lower the temperature in the kettle to room temperature, take out the material, cen...

Embodiment 3

[0029] Take 1000g of graphene with an average particle size of 5 microns and 500g of alcohol-water solution of potassium dodecyl phosphate, stir and mix evenly, filter, dry at 60°C for 4h, ball mill and sieve to obtain surface-activated graphene powder ; Wherein the composition and mass percent of the alcohol-water solution of potassium dodecyl phosphate are: 85% ethanol, 10% distilled water, 5% potassium dodecyl phosphate. Put 10Kg of PA1212 material, 100g of surface-activated graphene, and 80Kg of ethanol into a 100L reaction kettle, feed high-purity nitrogen gas to a pressure of 0.3MPa, heat with continuous stirring to raise the temperature in the kettle to 150°C, and keep warm at this temperature 120min; then use cooling water to lower the temperature, so that the temperature in the kettle drops to 75℃ at a cooling rate of 0.8℃ / min, increase the flow rate of cooling water to lower the temperature in the kettle to room temperature, take out the material, centrifuge and dry t...

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Abstract

The invention provides a nylon conductive powder preparation method for laser sintering. The nylon conductive powder preparation method comprises the following steps: adding conductive particles and a surfactant into an alcohol-water solvent; stirring, dispersing, drying and grinding to obtain surface-activated conductive particles; then, adding the surface-activated conductive particles into a nylon solution; heating, cooling and crystalizing; uniformly coating the inside of the nylon microspheres with the conductive particles, filtering, drying and screening to obtain a nylon powder material coated with the conductive particles. By adopting the nylon conductive powder preparation method, the prepared nylon conductive powder has uniform and concentrated particle size distribution, the conductive particles are distributed more uniformly, the powder is prevented from being separated easily in a using process, and the conductive performance and other relevant performance of nylon three-dimensional parts are improved.

Description

technical field [0001] The invention relates to a method for preparing nylon conductive powder for laser sintering. The nylon conductive powder prepared by the method is especially suitable for selective laser sintering technology. The three-dimensional parts prepared by the method have the characteristics of nylon material and have electrical conductivity. Background technique [0002] Selective laser sintering is a method of manufacturing three-dimensional objects by selectively fusing multiple layers of powder, which allows machining without tools but only by laser sintering multiple overlapping layers of powder according to the three-dimensional image of the object to be produced, to get a 3D solid. This method is mainly accomplished using thermoplastic polymers, and patents US6136948 and WO9606881 describe in detail the method of using powdered polymers to manufacture three-dimensional objects. [0003] Nylon is a class of thermoplastic engineering plastics with excell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L77/02C08K9/04C08K3/04C08K3/08
CPCC08K3/04C08K3/08C08K9/04C08K2003/0806C08K2003/085C08K2201/001C08K2201/003C08L77/06C08L77/02
Inventor 谭锐彭博罗秋帆陈礼
Owner HUNAN FARSOON HIGH TECH CO LTD
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