公开(公告)号：US20220118694A1

公开(公告)日：2022-04-21

申请号：US17561425

申请日：2021-12-23

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Yan Zhao ,  Kristopher J. Erickson ,  Aja Hartman ,  Lihua Zhao ,  Sterling Chaffins ,  Kevin P. DeKam

IPC: B29C64/165 ,  B33Y70/00 ,  B29C64/112 ,  B33Y10/00 ,  B29K105/00 ,  B29K505/14 ,  B29C64/393 ,  B29K77/00 ,  B29K105/16 ,  B33Y50/02 ,  B33Y30/00 ,  B29K507/04 ,  B29C64/20

Abstract: In an example method for forming three-dimensional (3D) printed electronic parts, a build material is applied. An electronic agent is selectively applied in a plurality of passes on a portion of the build material. A fusing agent is also selectively applied on the portion of the build material. The build material is exposed to radiation in a plurality of heating events. During at least one of the plurality of heating events, the portion of the build material in contact with the fusing agent fuses to form a region of a layer. The region of the layer exhibits an electronic property. An order of the plurality of passes, the selective application of the fusing agent, and the plurality of heating events is controlled to control a mechanical property of the layer and the electronic property of the region.

公开(公告)号：US20220009161A1

公开(公告)日：2022-01-13

申请号：US17298639

申请日：2019-10-10

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Aja Hartman ,  Wei Huang ,  Adekunle Olubummo ,  Kyle Wycoff ,  John Samuel Dilip Jangam

IPC: B29C64/165 ,  B33Y10/00 ,  B33Y70/00 ,  C09D177/02 ,  C09D7/63

Abstract: The present disclosure relates to a three-dimensional (3D) printing materials kit comprising: a first tailoring agent comprising at least one crosslinking agent; a second tailoring agent comprising at least one plasticizer, and a fusing agent. The present disclosure also relates to a printed structure comprising regions of relatively higher ductility and regions of relatively lower ductility. The regions of relatively higher ductility can be interspersed by the regions of relatively lower ductility, and the regions of relatively lower ductility can be formed from a crosslinked polymer and/or a polymer composition comprising a reinforcing filler, and/or the regions of relatively higher ductility can be formed from a polymer composition comprising a plasticizer. The present disclosure also relates to a method of three dimensional printing (3D) that can be used to print a 3D printed object comprising the printed structure described above.

公开(公告)号：US20210355319A1

公开(公告)日：2021-11-18

申请号：US17047720

申请日：2018-09-22

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Adekunle Olubummo ,  Lihua Zhao ,  Aja Hartman

IPC: C08L77/04 ,  B33Y70/00 ,  C08L63/00 ,  C08K5/17

Abstract: An example of a three-dimensional (3D) printing kit includes a build material composition, an epoxy agent to be applied to at least a portion of the build material composition during 3D printing, and a fusing agent to be applied to the at least the portion of the build material composition during 3D printing. The build material composition includes a polyamide having an amino functional group. The epoxy agent includes an epoxy having an epoxide functional group to react with the amino functional group of the polyamide in the at least the portion. The fusing agent includes an energy absorber.

公开(公告)号：US10781228B2

公开(公告)日：2020-09-22

申请号：US16079361

申请日：2017-02-06

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

Inventor： Adekunle Olubummo ,  Lihua Zhao ,  Aja Hartman ,  Howard S. Tom ,  Kristopher J. Erickson

IPC: C07F15/04 ,  C07C321/18 ,  B29C64/165 ,  C07F15/00 ,  B33Y70/00 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/393

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.