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A kind of high molecular weight nylon powder applicable to 3D printing and its preparation method

A 3D printing and nylon powder technology, which is applied in the field of high molecular weight nylon powder and its preparation, can solve the problem of high cost of nylon 12 powder, and achieve products with good mechanical properties and dimensional stability, uniform particle size distribution, and high molecular weight. Effect

Active Publication Date: 2016-11-30
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Among nylon materials, only nylon 12 with medium and low molecular weight is widely used in 3D printing, but the cost of nylon 12 powder is high

Method used

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  • A kind of high molecular weight nylon powder applicable to 3D printing and its preparation method
  • A kind of high molecular weight nylon powder applicable to 3D printing and its preparation method
  • A kind of high molecular weight nylon powder applicable to 3D printing and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Based on the weight of the caprolactam monomer, add 100 parts by weight of the caprolactam monomer into the container, vacuumize at a temperature of 90°C, and dehydrate in a vacuum state. When the pressure of the system shown by the vacuum gauge is <400Pa , remove the vacuum, add 0.005 parts by weight of sodium hydroxide and 0.1 parts by weight of antioxidant 1010, continue vacuuming, and heat up to 130 ° C. When the pressure of the system shown by the vacuum gauge<400Pa, the insulation reaction was carried out for 10 minutes. Add 0.01 parts by weight of p-phenylene 2,4-diisocyanate, stir until evenly mixed, pour into a container filled with quartz sand with a particle size of 1 micron that has been preheated to 160°C, keep warm and stir vigorously for 10 minutes, and cool down naturally to 25°C, and then through the sorting method with a suction air separator, nylon powder with a viscosity-average molecular weight of 900,000 and a particle size of 20-30 microns is obtai...

Embodiment 2

[0061] Based on the weight of the caprolactam monomer, add 100 parts by weight of the caprolactam monomer into the container, vacuumize at a temperature of 100°C, and dehydrate in a vacuum state. When the pressure of the system shown by the vacuum gauge is <400Pa , remove the vacuum, add 0.007 parts by weight of potassium hydroxide and 0.5 parts by weight of antioxidant 1096, continue vacuuming, and heat up to 135 ° C. When the pressure of the system shown by the vacuum gauge<400Pa, the insulation reaction was carried out for 10 minutes. Add 0.15 parts by weight of Lechner gum, stir until evenly mixed, pour into a container filled with iron, nickel, cobalt magnetic substance powders with a particle size of 10 microns that has been preheated to 165°C, keep warm and stir vigorously for 10 minutes Finally, cool down to 25°C naturally, keep warm and stir vigorously for 10 minutes, then cool down to 25°C naturally, and then use a magnetic separation separator to separate the nylon p...

Embodiment 3

[0063] Based on the weight part of dedecalactam monomer, add 100 parts by weight of dedecalactam monomer into the container, vacuumize at a temperature of 120 ° C, and dehydrate in a vacuum state. When the system shown by the vacuum gauge When the pressure is less than 400Pa, release the vacuum, add 1 weight part of magnesium hydroxide and 1 weight part of antioxidant 168, continue vacuuming, and raise the temperature to 140 ° C. When the pressure of the system shown by the vacuum gauge is less than 400 Pa, keep warm React for 20 minutes, add 2 parts by weight of hexamethylene diisocyanate, stir until evenly mixed, pour it into a container filled with machine-made sand with a particle size of 20 microns that has been preheated to 180°C, keep it warm and stir vigorously for 20 minutes, and naturally Cool down to 25°C, and then use a recirculating wind separator to obtain nylon powder with a viscosity-average molecular weight of 400,000 and a particle size of 30-50 microns. The m...

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Abstract

The present invention relates to a high molecular weight nylon powder that can be used for 3D printing, and is characterized in that, the powder composition is obtained by polymerizing the following raw materials in parts by weight, based on the parts by weight of lactam monomers , wherein the raw materials include: lactam: 100 parts by weight; basic catalyst: 0.005-1 part by weight; activator: 0.01-2 part by weight; antioxidant: 0.1-1 part by weight. The present invention also provides a preparation method and application of the above powder composition. The nylon powder of the invention has an adjustable viscosity average molecular weight of 50,000 to 900,000, the particle size of the powder particles is controllable at 20 to 100 microns, and the particle size distribution is uniform, the production process is green and environmentally friendly, and the prepared nylon powder can be used for 3D Print.

Description

technical field [0001] The invention relates to a high-molecular-weight nylon powder and a preparation method thereof, in particular to a high-molecular-weight nylon powder that can be used for 3D printing and a preparation method thereof. Background technique [0002] 3D printing technology, also known as laminated manufacturing technology, is an emerging technology in the field of rapid prototyping. Techniques for constructing objects. The basic principle is additive manufacturing, the technique of adding material layer by layer to generate a three-dimensional solid. At present, 3D printing technology is mainly used in product prototyping, mold manufacturing, art creation, jewelry making and other fields, replacing these traditional fine processing techniques. In addition, 3D printing technology is gradually applied in fields such as medicine, bioengineering, architecture, clothing, aviation, etc., opening up a broad space for innovation. [0003] At present, the polyme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/14C08G69/20C08L77/02B29C67/00
Inventor 马永梅郑鲲张京楠曹新宇王佛松林学春孙文华徐坚董金勇李春成符文鑫
Owner INST OF CHEM CHINESE ACAD OF SCI
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