National Taiwan University

Yu-Deh Chao

Jeng-Ywan Jeng

Shu-Cheng Liu

Pin-Cheng Wang

Dong-Quan Yeh

Fu-Lin Chen

The present invention provides a polymer composite particle material for three-dimensional printing. The polymer composite particle material is formed by embedding a carbon powder on a surface of a polymer powder. When the carbon powder is mixed with the polymer powder, a device with a shear force is used for stirring. Heating is performed during the stirring, such that melting occurs at the surface of the polymer powder. The carbon powder is embedded on the surface of the polymer powder to form a shell-core structure powder, and at the same time, the carbon powder is uniformly coated. The preparation method is simple and no additional dispersant and binder are needed. Besides the carbon powder will not easily separate from the polymer powder. At the same time, the agglomerated carbon powder can be dispersed by rubbing and evenly dispersed around the polymer powder to reduce a laser reflectivity.

Preparation method for polymer composite particle material, and three-dimensional printing method by using polymer composite particle material

The invention provides a composite particle material for selective laser sintering (SLS), which is composed of an inorganic powder coated with a binder. The composite particulate material is formed by mixing the inorganic powder and the binder to have the binder directly coated on the outer surface of the inorganic powder. In addition, the inorganic powder to be coated by the binder is preferably using a powder having a smaller particle size and a larger particle size distribution, and thereby the production cost can be greatly reduced. Further, since the outer surface of the inorganic powder is coated with the binder, there are no problems such as causing oxidation of the inorganic powder and so on. Furthermore, manufacturing the composite particle material can be easily carried out in a general ambient or an atmospheric environment, and the powder material after use is recyclable.

Composite particle material for selective laser sintering, preparation method thereof, and three-dimensional printing method for high-density green body by using the same

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Taipei, Taiwan

Yu-Deh Chao