公开(公告)号：US20190092799A1

公开(公告)日：2019-03-28

申请号：US16079361

申请日：2017-02-06

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Paul OLUBUMMO ,  Lihua ZHAO ,  Aja HARTMAN ,  Howard S. TOM ,  Kristopher J. ERICKSON

IPC: C07F15/04 ,  C07C321/18 ,  B29C64/165

Abstract: An example of a fusing agent includes a metal bis(dithiolene) complex, a thiol surfactant, a polar aprotic solvent, and a balance of water. In an example of a method of making the fusing agent, the metal bis(dithiolene) complex is exposed to an aqueous solution including a reducing agent and a thiol surfactant to form a reduced metal bis(dithiolene) complex and to dissolve the reduced metal bis(dithiolene) complex in the aqueous solution. The aqueous solution is incorporated into a vehicle including a water soluble organic solvent and an additive selected from the group consisting of an emulsifier, a surface tension reduction agent, a wetting agent, a scale inhibitor, an anti-deceleration agent, a chelating agent, an antimicrobial agent, and a combination thereof. The fusing agent may be utilized in a three-dimensional printing method and/or incorporated into a three-dimensional printing system.

公开(公告)号：US20210197445A1

公开(公告)日：2021-07-01

申请号：US16080221

申请日：2017-06-28

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Paul OLUBUMMO ,  Kristopher J. ERICKSON ,  Aja HARTMAN ,  Lihua ZHAO

IPC: B29C64/124 ,  B29C64/218 ,  B29C64/314 ,  B29C64/165 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/10 ,  B33Y70/00

Abstract: In an example, a three-dimensional (3D) printed part comprises a plurality of fused build material layers including exterior layers and interior layers. At least some of the interior layers include a composite portion having a miscible solid physically bonded to an amide functionality or an amine functionality of the build material. The miscible solid is a solid at a room temperature ranging from about 18° C. to about 25° C.

公开(公告)号：US20190077080A1

公开(公告)日：2019-03-14

申请号：US16077753

申请日：2017-02-06

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Yan ZHAO ,  Lihua ZHAO ,  Paul OLUBUMMO ,  Aja HARTMAN ,  Howard S. TOM

IPC: B29C64/268 ,  B29C64/291 ,  B29C64/393 ,  C09D11/50

Abstract: In an example of a three-dimensional (3D) printing method, a polymeric or polymeric composite build material is applied. A fusing agent is selectively applied on at least a portion of the polymeric or polymeric composite build material. The fusing agent includes a discolorable near-infrared absorbing dye, a thiol surfactant, a reducing agent, and a balance of water. Near-infrared radiation is applied to the polymeric or polymeric composite build material at a condition that maintains a temperature of the selectively applied fusing agent below a decomposition temperature of the fusing agent and that allows the discolorable near-infrared absorbing dye to harvest near-infrared radiation energy, in order to fuse the portion of the polymeric or polymeric composite build material in contact with the fusing agent to form a layer and to initiate discoloration of the discolorable near-infrared absorbing dye in the layer.

公开(公告)号：US20190048219A1

公开(公告)日：2019-02-14

申请号：US16076918

申请日：2017-02-06

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Paul OLUBUMMO ,  Lihua ZHAO ,  Kristopher J. ERICKSON ,  Howard S. TOM ,  Aja HARTMAN

IPC: C09D11/54 ,  B29C64/165 ,  B29C64/20 ,  B29C64/393 ,  B29C64/112 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y70/00 ,  C09D11/38 ,  C09D11/328 ,  C09D11/101 ,  C09D11/033 ,  C09D11/037 ,  C09D11/102

Abstract: An example of a fusing agent includes a tetraphenyldiamine-based dye, alkyldiphenyloxide disulfonate, 1-methyl-2-pyrrolidone, and a balance of water. The fusing agent excludes a strong reducing species. The fusing agent may be incorporated into a three-dimensional printing method or a three-dimensional printing system. In an example of the three-dimensional printing method, a polymeric or polymeric composite build material is applied. The fusing agent is selectively applied on at least a portion of the polymeric or polymeric composite build material. The polymeric or polymeric composite build material is exposed to electromagnetic radiation to fuse the portion of the polymeric or polymeric composite build material in contact with the fusing agent to form a layer.