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A weather-resistant nylon powder composite material for 3D printing and its preparation method

A technology of nylon powder and composite materials, which is applied in the field of weather-resistant nylon powder composite materials for 3D printing and its preparation, which can solve the problems of not meeting the requirements of product precision and strength, affecting the precision and strength of 3D printing products, and uneven distribution of mixing and mixing , to achieve the effects of difficult stratification and de-powdering, narrow distribution of spherical particles, and low cost

Active Publication Date: 2017-08-25
QINGDAO UNIV OF SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The nylon powder composite material for 3D printing disclosed in the above patent and its preparation method have the following common deficiencies, which affect its promotion and application
[0010] ①The shape of the powder is irregular and the particle size distribution is uneven, resulting in the inability to carry out selective laser sintering molding or serious warping and deformation of the molded product, which cannot meet the requirements of industrial applications for product precision and strength
[0011] ②Complicated process and high cost, slow cooling is required in the process of powder precipitation, low preparation efficiency and high energy consumption
[0012] ③ Stirring and mixing are not evenly distributed, and the composite material powder is easy to delaminate and depowder, which affects the accuracy and strength of 3D printed products
[0013] ④During the printing process, or when materials and products are exposed to long-term irradiation containing UV light, yellowing and brittleness are prone to occur

Method used

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  • A weather-resistant nylon powder composite material for 3D printing and its preparation method
  • A weather-resistant nylon powder composite material for 3D printing and its preparation method
  • A weather-resistant nylon powder composite material for 3D printing and its preparation method

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preparation example Construction

[0049] The preparation method of comparative example 1 in the above table is as follows:

[0050] (1) Take PA12 according to the weight ratio of the formula;

[0051] (2) Put PA12 and trifluoroethanol in a nitrogen-filled airtight container, and stir continuously to form a nylon solution; the amount of trifluoroethanol solvent is the quality of nylon resin: solvent volume=1:1~1:5;

[0052] (3) Transport the solution to the spray dryer through a peristaltic pump, and carry out atomization, drying, powder collection and formic acid recovery and reuse under the protection of nitrogen; the air inlet temperature is 125±2°C, and the air outlet temperature is 85±2°C °C °C, oxygen concentration ≤1.5%.

[0053] (4) Place the collected powder in a vacuum dryer, dry at room temperature for 3 hours, and seal the package to obtain a weather-resistant nylon powder composite material for 3D printing.

[0054] Comparative example 2 in the above table is the PA12 powder material for 3D print...

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Abstract

The invention discloses a 3D printing weather-resistant nylon powder composite material and a preparation method thereof. The 3D printing weather-resistant nylon powder composite material is characterized by being prepared from the following components in percentage by mass: 97-99.4wt% of nylon, 0.1-0.5wt% of a hindered amine light stabilizer, 0.1-0.5wt% of an ultraviolet light absorber, 0.1-0.5wt% of a hindered phenol antioxidant, 0.2-1.0wt% of a phosphite ester antioxidant and 0.1-0.5wt% of other additives, wherein the other additives comprise one or combination of multiple components of a dispersing agent, a nucleating agent and a lubricant. With the combination of the hindered amine light stabilizer, the ultraviolet light absorber, the hindered phenol antioxidant and the phosphite ester antioxidant, the 3D printing weather-resistant nylon powder composite material prepared through spray-drying is excellent in weather resistance and small in mechanical property change before and after being modified, can be recycled and reused for multiple times, is narrow in spherical granule distribution, good in flowing property, free of layering or powder dropping, and moreover is high in preparation efficiency, small in energy consumption and simple and easy to process.

Description

technical field [0001] The invention belongs to the technical field of nylon powder composite materials, and in particular relates to a weather-resistant nylon powder composite material for 3D printing and a preparation method thereof. Background technique [0002] 3D printing technology is an emerging rapid prototyping technology, known as "the most iconic production tool of the third industrial revolution". Selective laser sintering technology is a high-tech 3D printing technology that integrates the latest achievements in the fields of CAD / CAM, numerical control technology, laser processing technology and material science. Applying this technology, powder materials can be bonded to each other and stacked layer by layer through laser irradiation, so as to realize rapid prototyping of products. Compared with the 3D printing technology of polymer materials such as fused deposition rapid prototyping of amorphous polymers such as polystyrene and ABS, and photocuring of photos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08L77/06C08K13/02C08K5/526C08K5/134C08K5/3475
CPCC08K5/1345C08K5/3475C08K5/526C08K13/02C08K2201/011C08L2201/08C08L2205/24C08L77/02C08L77/06
Inventor 李伟许慧忠杜一轩刘永辉李生李超芹刘莉李荣勋申欣
Owner QINGDAO UNIV OF SCI & TECH
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