US 11,850,795 B2
Three-dimensional printing with triethylene glycol fusing agents
Stephen G. Rudisill, San Diego, CA (US); and Carolin Fleischmann, San Diego, CA (US)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 17/294,101
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
PCT Filed Jun. 10, 2019, PCT No. PCT/US2019/036400
§ 371(c)(1), (2) Date May 14, 2021,
PCT Pub. No. WO2020/251541, PCT Pub. Date Dec. 17, 2020.
Prior Publication US 2022/0088857 A1, Mar. 24, 2022
Int. Cl. B29C 64/165 (2017.01); B29C 64/264 (2017.01); B29C 64/295 (2017.01); B29C 64/30 (2017.01); B29C 64/188 (2017.01); B33Y 70/10 (2020.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 40/20 (2020.01)
CPC B29C 64/165 (2017.08) [B29C 64/188 (2017.08); B29C 64/264 (2017.08); B29C 64/295 (2017.08); B29C 64/30 (2017.08); B29K 2995/0012 (2013.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 40/20 (2020.01); B33Y 70/10 (2020.01)] 10 Claims
OG exemplary drawing
 
1. A method comprising:
iteratively applying individual build material layers of polymer particles to a powder bed;
based on a three-dimensional object model, selectively jetting a fusing agent onto the individual build material layers, wherein the fusing agent comprises water, a radiation absorber, and triethylene glycol in an amount from about 20 wt % to about 35 wt %, and wherein the radiation absorber absorbs radiation energy and converts the radiation energy to heat;
exposing the powder bed to radiation energy to selectively fuse the polymer particles in contact with the radiation absorber at the individual build material layers and thereby form a three-dimensional printed article; and
post-curing the three-dimensional printed article at a post-cure temperature from about 160° C. to about 250° C. for a post-cure time from about 2 hours to about 30 hours so as to increase crosslinking of the polymer with the triethylene glycol.