A kind of 3D printing powder and preparation method thereof
A 3D printing and powder technology, applied in the direction of additive processing, etc., can solve the problems of uniform dispersion of flame retardants in 3D printing powders, uneven distribution of flame retardants, agglomeration, etc., and achieve smooth parts and flame retardant performance Excellent, full effect of polyamide
Active Publication Date: 2022-02-18
KINGFA SCI & TECH CO LTD
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Problems solved by technology
[0006] In the existing technology, it is difficult to achieve uniform dispersion of flame retardants in 3D printing powders
Even if the flame retardant particles with a particle size of less than 5 microns are used, it is difficult to meet the above requirements, because these flame retardants will agglomerate and precipitate during the melting process, resulting in uneven distribution of the flame retardant in the resin matrix
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0066] Add 100g of polyamide waste PA12 into the compound solvent (100g of phenol / 200g of toluene), heat to a temperature of 80°C and stir until dissolved, then add 10g of activated carbon, keep stirring for 0.5 hours, cool down to 40°C and filter to obtain a clear solution of polyamide Add 10g of flame retardant A into the polyamide clarified solution, stir until fully dissolved to obtain a functional polyamide solution; then spray the functional polyamide solution into 4000g deionized water (the temperature of the deionized water is maintained at 0- 10°C), the polyamide flame-retardant modified 3D printing powder was precipitated; weighed after drying, and then tested other properties.
Embodiment 2
[0068] The difference between embodiment 2 and embodiment 1 is that flame retardant B is added together with activated carbon.
Embodiment 3
[0070] The difference between Example 3 and Example 1 is that the flame retardant is C.
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Abstract
The invention discloses a modified 3D printing powder with flame-retardant function, which comprises the following components in parts by weight: 100 parts of polyamide; 1-30 parts of flame retardant; The micron form is dispersed in the polyamide resin matrix. At the same time, the particle size distribution of the 3D printing powder is uniform, the fluidity is good, and the bulk density is suitable. The 3D printing powder of the present invention is prepared by a solution method. The resins of new polyamide materials, waste materials and recycled materials are dissolved in a phenol / toluene-based solvent system, and after decolorization (required steps for processing polyamide waste materials), Filtration and purification to obtain a polyamide clarified solution, add a flame retardant to the polyamide clarified solution to fully dissolve the flame retardant, and finally spray the solution into deionized water by spraying to obtain regular particles, uniform particle size, and good fluidity Modified 3D printing powder.
Description
technical field [0001] The invention relates to the technical field of green polymer materials, in particular to a 3D printing powder and a preparation method thereof. Background technique [0002] Compared with traditional technology, 3D printing technology has strong designability, simple process and low energy consumption. It is suitable for customized production and can greatly shorten the production cycle from design to parts. fields are widely used. For different application fields, 3D printing powders of different material types have been developed. Among polymer 3D printing powder materials, the research and application of polyamide 3D printing powder is one of the important research fields. [0003] At present, the method of preparing polyamide 3D printing powder is mainly cryogenic pulverization combined with grinding method. Patent CN107151441A, patent CN108017905A and other patents use the cryogenic crushing method to crush polyamide granules to obtain polyami...
Claims
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IPC IPC(8): C08L77/02C08L83/04C08K7/24C08K5/00C08K5/521C08K5/5313B33Y70/10
CPCC08L77/02C08K7/24C08K5/00C08K5/521C08K5/5313B33Y70/10C08L2201/02C08L2207/20C08L83/04
Inventor 常欢叶南飚李成周沃华刘鑫鑫朱秀梅苏榆钧唐磊黄险波
Owner KINGFA SCI & TECH CO LTD