公开(公告)号：US20230035064A1

公开(公告)日：2023-02-02

申请号：US17758158

申请日：2020-01-29

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

Inventor： Emre Hiro DISCEKICI ,  Shannon Reuben WOODRUFF ,  Greg Scott LONG

IPC: B29C64/165 ,  B33Y10/00 ,  B33Y70/10

Abstract: A three-dimensional printing kit can include a polymeric build material and a fusing agent. The polymeric build material can include polymer particles having a D50 particle size from about 2 μm to about 150 μm. The fusing agent can include an aqueous liquid vehicle including water and an organic co-solvent, a radiation absorber to generate heat from absorbed electromagnetic radiation, and from about 2 wt % to about 15 wt % of a carbamide-containing compound.

公开(公告)号：US20210197455A1

公开(公告)日：2021-07-01

申请号：US16077752

申请日：2017-07-14

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

Inventor： Shannon Reuben WOODRUFF ,  Ali EMAMJOMEH ,  Yi FENG ,  Erica FUNG ,  Carolin FLEISCHMANN ,  Geoffrey SCHMID

IPC: B29C64/165 ,  B33Y70/00

Abstract: This disclosure relates to a method of 3-D printing comprising: applying a layer of build material onto a print platform, wherein the build material comprises particles of a polymer comprising polymer chains having at least one reactive group that is protected with a protecting group; printing a de-protecting agent at selected locations on the layer of build material; and coalescing particles of the polymer at the printed locations on the layer of build material to form a coalesced polymer layer.

公开(公告)号：US20240059009A1

公开(公告)日：2024-02-22

申请号：US18271219

申请日：2021-01-11

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

Inventor： Emre Hiro DISCEKICI ,  Dennis J. SCHISSLER ,  Shannon Reuben WOODRUFF

IPC: B29C64/165 ,  B33Y10/00 ,  B33Y70/00

CPC classification number: B29C64/165 ,  B33Y10/00 ,  B33Y70/00 ,  B29K2105/0038

Abstract: The present disclosure describes multi-fluid kits for three-dimensional printing, three-dimensional printing kits, and methods of three-dimensional printing. In one example, a multi-fluid kit for three-dimensional printing can include a fusing agent and a ductility agent. The fusing agent can include water and electromagnetic radiation absorber. The electromagnetic radiation absorber can absorb radiation energy and convert the radiation energy to heat. The ductility agent can include water, a water-soluble pore-generating compound that chemically reacts at an elevated temperature to generate a gas, and a plasticizer. The plasticizer can have formula (I) wherein n is an integer ranging from 3 to 8; or formula (II) wherein m is an integer ranging from 3 to 8.

公开(公告)号：US20220152923A1

公开(公告)日：2022-05-19

申请号：US17298643

申请日：2019-09-18

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

Inventor： Emre Hiro DISCEKICI ,  Graciela Emma NEGRI JIMENEZ ,  Shannon Reuben WOODRUFF

IPC: B29C64/188 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/165

Abstract: In an example of a method for three-dimensional (3D) printing, a polymeric build material is applied to form a build material layer. A fusing agent is selectively applied, based on a 3D object model, onto the build material layer to form a patterned portion. A hydrophilic agent is selectively applied, based on the 3D object model, onto at least a portion of the patterned portion. The hydrophilic agent includes from 1 wt % to 12 wt % of a hydrophilic polymer dissolved in an aqueous liquid vehicle, wherein the hydrophilic polymer has a molar mass ranging from 1000 g/mol to 12,000 g/mol and is water-absorbent at a water to hydrophilic polymer weight ratio from 2:1 to 1000:1. The build material layer is exposed to energy to selectively coalesce the patterned portion and form a 3D object layer having a hydrophilic portion.

公开(公告)号：US20240316861A1

公开(公告)日：2024-09-26

申请号：US18269744

申请日：2021-01-08

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

Inventor： Shannon Reuben WOODRUFF ,  Graciela Emma NEGRI JIMENEZ ,  Emre Hiro DISCEKICI

IPC: B29C64/165 ,  B29K77/00 ,  B33Y10/00 ,  B33Y70/10

CPC classification number: B29C64/165 ,  B33Y10/00 ,  B33Y70/10 ,  B29K2077/00 ,  B29K2995/0016

Abstract: A three-dimensional printing kit can include a build material, a fusing agent, and a flame retardant. The build material can include polyamide particles. The fusing agent can include a radiation absorber to generate heat from absorbed electromagnetic radiation and an aqueous liquid vehicle including water. The flame retardant can include 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide. The flame retardant can be included at from about 5 wt % to about 30 wt % in the fusing agent, at from about 5 wt % to about 30 wt % in a flame retardant agent if present that is separate from the fusing agent, or at from about 5 wt % to about 30 wt % in the fusing agent and from about 5 wt % to about 30 wt % in the flame retardant agent.

公开(公告)号：US20240300169A1

公开(公告)日：2024-09-12

申请号：US18280638

申请日：2021-03-12

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

Inventor： Emre Hiro DISCEKICI ,  Dennis J. SCHISSLER ,  Shannon Reuben WOODRUFF

IPC: B29C64/165 ,  B29C64/291 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y80/00

CPC classification number: B29C64/165 ,  B29C64/291 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y80/00

Abstract: The present disclosure provides methods of three-dimensional printing, including iteratively applying individual build material layers of polymer particles having a D50 particle size from about 20 μm to about 150 μm to a build material, and based on a three-dimensional object model, selectively applying a fusing agent onto the individual build material layers to form individually patterned object layers of the three-dimensional object and selectively applying a pore-promoting agent onto the individual build material layers at a discrete location of the individually patterned object layers to form a pore-generating region therein. The method also includes exposing the build material to electromagnetic energy to provide selective heat fusing of the polymer particles and to generate and displace molten polymer leaving a localized void having a void size from about 1 mm to about 20 mm.

公开(公告)号：US20240157631A1

公开(公告)日：2024-05-16

申请号：US18280871

申请日：2021-03-12

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

Inventor： Emre Hiro DISCEKICI ,  Shannon Reuben WOODRUFF ,  Dennis J. SCHISSLER ,  Graciela Emma NEGRI JIMENEZ

IPC: B29C64/118 ,  B29C44/34 ,  B29C64/291 ,  B29C64/295 ,  B33Y10/00 ,  B33Y70/10

CPC classification number: B29C64/118 ,  B29C44/348 ,  B29C64/291 ,  B29C64/295 ,  B33Y10/00 ,  B33Y70/10

Abstract: The present disclosure includes a multi-fluid kit for three-dimensional printing. The multi-fluid kit can include a fusing agent comprising water and a radiation absorber that absorbs radiation energy and converts the radiation energy to heat, an acidic agent having a pH from about pH 1 to about pH 6.9 that includes water and an acidic component, and a pore-promoting agent including water and a pore-promoting compound. The pore-promoting compound can chemically react with the acidic component to generate a gas, and can be selected from sodium bicarbonate, potassium bicarbonate, or a combination thereof.

公开(公告)号：US20240141203A1

公开(公告)日：2024-05-02

申请号：US18269742

申请日：2021-01-05

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

Inventor： Emre Hiro DISCEKICI ,  Shannon Reuben WOODRUFF ,  Mark KOWALSKI ,  Alay YEMANE ,  Graciela Emma NEGRI JIMENEZ

IPC: C09D177/04 ,  B33Y70/10 ,  C09D7/20

CPC classification number: C09D177/04 ,  B33Y70/10 ,  C09D7/20 ,  B29K2077/00

Abstract: The present disclosure describes multi-fluid kits for three-dimensional printing, three-dimensional printing kits, and systems for three-dimensional printing. In one example, a multi-fluid kit for three-dimensional printing can include a fusing agent, a solubilizing agent, and a detailing agent. The fusing agent can include water and an electromagnetic radiation absorber. The electromagnetic radiation absorber can absorb radiation energy and convert the radiation energy to heat. The solubilizing agent can include benzyl alcohol, an organic cosolvent, and water. The detailing agent can include a detailing compound.