	US 11,746,188 B2
	Poly(aryl-ether-ketone) (PAEK) powder suitable for multiple use in sintering methods
Benoît Brule, Peaumont-le-Roger (FR); and Jérome Pascal, Grandchain (FR)
Assigned to Arkema France, Colombes (FR)
Appl. No. 16/80,261
Filed by Arkema France, Colombes (FR)
PCT Filed Feb. 28, 2017, PCT No. PCT/FR2017/050439 § 371(c)(1), (2) Date Aug. 27, 2018, PCT Pub. No. WO2017/149233, PCT Pub. Date Sep. 8, 2017.
Claims priority of application No. 1651821 (FR), filed on Mar. 4, 2016.
Prior Publication US 2019/0062498 A1, Feb. 28, 2019 Prior Publication US 2021/0171709 A2, Jun. 10, 2021
Int. Cl. B29C 64/264 (2017.01); C08G 65/40 (2006.01); B29C 64/153 (2017.01); B33Y 70/00 (2020.01); B29K 71/00 (2006.01); B33Y 10/00 (2015.01); B29K 271/00 (2006.01)

CPC C08G 65/4012 (2013.01) [B29C 64/153 (2017.08); B29C 64/264 (2017.08); B33Y 70/00 (2014.12); B29K 2071/00 (2013.01); B29K 2271/00 (2013.01); B33Y 10/00 (2014.12); C08G 2650/40 (2013.01)]

13 Claims

1. A method for building a three-dimensional object layer-by-layer by electromagnetic radiation-generated sintering of powder,

wherein the powder is a poly(aryl-ether-ketone) (PAEK) powder, the powder being obtained from thermal pretreatment at a temperature between 260° C. and 290° C. and having a melting temperature which is stable at the build temperature and which is below or equal to 330° C.,

wherein the powder comprises a mixture of recycled and non-recycled powders,

wherein parameters of the sintering machine include laser power and powder bed temperature,

wherein the sintering is conducted in a sintering machine and wherein at least two successive sinterings are carried out while keeping the laser power of the sintering machine and the bed temperature unchanged, and

wherein the second sintering of the at least two successive sinterings uses the unsintered powder from the first sintering of the at least two successive sinterings as recycled powder.