3D polymers for sintering applications

Eastman continues to serve the additive manufacturing market by developing innovative materials for various 3D printing techniques, including powder sintering (also referred to as LS or HSS). Eastman Amphora™ SP1621 3D polymer, for example, is ideal for a variety of powder-based additive manufacturing techniques, including laser and thermal sintering processes.

One of the most economically scalable methods of additive manufacturing, sintering processes utilize laser or thermal energy to create prototypes and fully functional parts. Compared to extrusion methods that use polymer filament, powder sintering-based 3D printers allow the creation of intricate designs because the powder bed acts as a support during the printing process—buttressing overhangs, undercuts, and thin-walled designs until the polymer sinters. Advantages of using Amphora SP1621 in sintering-based additive manufacturing processes include:

  • Resolution and accuracy—enabling designs with both thick and thin sections—including intricate lattices
  • Compression and rebound properties—ideal for creating customized athletic footwear
  • Favorable processing—such as optimal spreadability, thermal stability, and color stability
  • Recyclability—reusing powder enables manufacturers to easily gather and recycle the powder that has not been fused. ​​