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Preparation method of nylon powder for 3D (three-dimensional) printing

A nylon powder and 3D printing technology, applied in the field of nylon powder preparation, can solve the problems of long powder production cycle, high process control requirements, difficult mass production, etc., and achieve the effect of meeting performance requirements, uniform particle size distribution, and easy process

Inactive Publication Date: 2014-12-10
LIHE WUHAN NEW CHEM MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solvent precipitation method needs to heat the alcohol solvent to above 150°C during the preparation process. High-pressure steam will be formed in the reaction kettle during the high-temperature preparation process, which requires high process control and is difficult. The powder production cycle is long and it is difficult to achieve mass production.

Method used

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  • Preparation method of nylon powder for 3D (three-dimensional) printing

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preparation example Construction

[0015] A kind of preparation method of the nylon powder that is used for 3D printing of the embodiment of the present invention, it comprises the following steps:

[0016] S1. Nylon modification: put the nylon 12 base material into the mixer, spray and add additives to the nylon 12 base material, the additives are surfactants, light absorbers, compatibilizers, Adhesive, antioxidant and heat conduction powder, the nylon 12 base material and additives are stirred evenly, and then dried to obtain the modified nylon base material.

[0017] Nylon 12 is chemically known as polylaurolactam. Using high-speed stirring to modify the nylon 12 base material, so that various additives can be attached to the surface of the powder without high-temperature melting, and the modification effect is obvious.

[0018] Optionally, the surfactant is sodium dodecylbenzenesulfonate. The light absorber is 2-(2-hydroxy-3,5-dibutyl-tert-phenyl)-5-chlorobenzotriazole (English name is UV327). The compat...

Embodiment 1

[0027] Put the nylon 12 base material into a mixer, add surfactant, light absorber, compatibilizer, viscosity reducer, antioxidant and heat conduction powder, stir evenly and then dry to obtain the modified nylon base material; Add the modified nylon base material, solvent oil and emulsifier into the reaction kettle, stir and heat to 200°C to melt the modified nylon base material into a liquid, stir and emulsify at high speed for 30 minutes to form a high-temperature nylon emulsion at a speed of 500 rpm; Cool quickly to form a nylon suspension, and undergo solid-liquid separation, washing, drying, and grading and sieving to obtain spherical nylon powder for 3D printing. The average particle size of the nylon powder is 57.6 μm.

Embodiment 2

[0029] Put the nylon 12 base material into a mixer, add surfactant, light absorber, compatibilizer, viscosity reducer, antioxidant and heat conduction powder, stir evenly and then dry to obtain the modified nylon base material; Add the modified nylon base material, solvent oil and emulsifier into the reaction kettle, stir and heat to 180°C to melt the modified nylon base material into a liquid, stir and emulsify at high speed for 20 minutes to form a nylon high-temperature emulsion at a speed of 1500 rpm; put the nylon high-temperature emulsion Cool quickly to form a nylon suspension, and undergo solid-liquid separation, washing, drying, and grading and sieving to obtain spherical nylon powder for 3D printing. The average particle size of the nylon powder is 63.7 μm.

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Abstract

The invention discloses a preparation method of nylon powder for 3D (three-dimensional) printing. The preparation method comprises the following steps: adding a surfactant, a light absorber, a bulking agent, a viscosity reducer, an antioxidant and heat conducting power and the like into nylon powder, and stirring and mixing at a high speed to obtain modified nylon filler; adding the modified nylon filler, solvent oil and an emulsifier into a reaction kettle, stirring and heating to 180-260 DEG C to dissolve the nylon powder to a liquid, and stirring and emulsifying at a high speed to obtain a nylon high-temperature emulsion; quickly cooling the nylon high-temperature emulsion into a nylon suspension; and separating, washing, drying and sieving to obtain spherical nylon powder with diameters of 30-100 mu m. The preparation process disclosed by the invention is simple and feasible, the preparation time is short in period, and the process is easy to control and good in repeatability. The synthesized product is uniform in size distribution, regular in shape, spherical or size approximately spherical and good in heat conductivity of powder and mobility, so that the nylon powder has a wide application prospect in 3D printing materials.

Description

technical field [0001] The invention relates to the technical field of nylon powder preparation, in particular to a method for preparing nylon powder for 3D printing. Background technique [0002] 3D printing is a rapid prototyping technology based on digital model files, using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. Nylon is a crystalline polymer with excellent sintering performance, high product strength and good toughness, and is very suitable for 3D printing of polymer materials. However, 3D printing requires that the powder material has a spherical or nearly spherical shape, and the particle size distribution must be uniform, and the thermal conductivity and flow of the powder should be good, so that it can be easily melted and formed by heating, and the surface finish of the product can be improved. [0003] At present, the preparation methods of nylon powder materials for 3D printing mainly include mechani...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08L51/06C08K13/02C08K5/3475C08K3/04C08K5/134C08K3/22
CPCC08L77/02C08J3/095C08J3/12C08J2377/02C08L2201/08C08L51/06C08K13/02C08K5/3475C08K3/04C08K5/134C08K2003/2227
Inventor 彭凡李娜胡霞李玲彭良莹沈国春
Owner LIHE WUHAN NEW CHEM MATERIALS
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