A kind of low-warpage nylon powder composite material for 3D printing and its preparation method
A nylon powder, 3D printing technology, applied in the direction of additive processing, etc., can solve the problems of not meeting the requirements of product accuracy and strength, affecting the accuracy and strength of 3D printing products, and warping and deforming printed products. Powder removal, low cost, and the effect of improving precision and strength
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[0053] The preparation method of comparative example 1 in the above table is as follows:
[0054] (1) Take PA12 according to the weight ratio of the formula;
[0055] (2) Put each component and trifluoroethanol into 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;
[0056] (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%.
[0057] (4) Place the collected powder in a vacuum dryer, dry at room temperature for 3 hours, and seal the package to obtain a low-warpage nylon powder composite material for 3D printing.
[0058] Comparative example 2 in the above table is the PA12 powder material for 3D...
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