Polymer Powder Composition For Additive Manufacturing
AssigneeHexcel Corporation
InventorsWhitney Kline, Alden Winn, Lawrence Varholak
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Abstract
A powder composition suitable for use in selective laser sintering for printing an object. The powder composition includes a first fraction having a polyetherketoneketone (PEKK) powder having a plurality of particles. The powder composition includes a second fraction having a plurality of siloxane particles that is dry blended with the PEKK powder prior to selective laser sintering of the powder. In some embodiments, the powder composition includes a third fraction of carbon fiber. The powder composition when used in selective laser sintering results in parts with more consistent results and improves process economics.
Claims20
A powder composition suitable for use in selective laser sintering for printing a three-dimensional object, the powder composition comprising:
- a first fraction comprising a polyetherketoneketone (PEKK) powder having a plurality of particles, the plurality of particles having a mean diameter between 30 μm to 90 μm;
- a second fraction comprising a siloxane powder having a plurality of particles.
A method of preparing a powder composition suitable for use in laser sintering for printing a three-dimensional object, the method including the steps of:
- providing a polyetherketoneketone (PEKK) powder having a plurality of particles;
- providing a siloxane powder having a plurality of particles;
- mixing the PEKK powder with the siloxane powder to obtain a powder composition suitable for use in selective laser sintering.
Dependencies are inferred from the claim text.