Method for producing a partially recycled polyaryletherketone powder by sintering
AssigneeArkema France
InventorsGuillaume Le, Benoît Brule, Christophe Caremiaux
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Abstract
A process for the layer-by-layer manufacture of a three-dimensional object by sintering of a powder based on PAEK(s) with electromagnetic radiation, wherein the powder includes at least one PAEK and at least one phosphate, said powder being, at least in part, a recycled powder. The recycled powder is obtainable by continuous or discontinuous heating, over a period of at least six hours, of a powder of the same composition at a constant or nonconstant temperature, strictly between the glass transition temperature, Tg, and the melting temperature, Tm, of the powder. Also, an article obtained by this process and to uses of phosphate(s) in compositions based on PAEK(s).
Claims18
A process for the layer-by-layer manufacture of a three-dimensional object by sintering of a powder based on polyaryletherketone(s) (PAEK(s)) with electromagnetic radiation, wherein
- said powder comprises at least 50% by weight, relative to a total weight of powder, of at least one PAEK and at least one phosphate, said powder being, at least in part, a recycled powder, said phosphate being a phosphorus atom surrounded by four oxygen atoms in a tetrahedron;
- said recycled powder being obtainable by continuous or discontinuous heating, over a period of at least six hours, of a powder of a same composition at a constant or nonconstant temperature, strictly between a glass transition temperature, Tg, and a melting temperature, Tm, of the powder.
Dependencies are inferred from the claim text.