公开(公告)号：US20230081047A1

公开(公告)日：2023-03-16

申请号：US17799768

申请日：2020-03-11

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

Inventor： Emre Hiro Discekici ,  Shannon Reuben Woodruff ,  Mariya Gelman ,  Jesiska Tandy ,  Alay Yemane

IPC: C08K5/25 ,  B33Y70/00 ,  B29C64/165 ,  B29C64/357 ,  B33Y40/00 ,  B29C64/314 ,  B33Y10/00

Abstract: A three-dimensional printing kit can include a polymeric build material including from about 80 wt % to 100 wt % polymer particles having an average particle size from about 10 μm to about 150 μm and from about 0.01 wt % to about 2 wt % dihydrazide, and a fusing agent formulation including an aqueous liquid vehicle and a radiation absorber.

公开(公告)号：US11590696B2

公开(公告)日：2023-02-28

申请号：US16603957

申请日：2018-06-25

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

Inventor： Carolin Fleischmann ,  Erica Fung ,  Jesiska Tandy ,  Greg S. Long ,  Ali Emamjomeh ,  Shannon Reuben Woodruff ,  Rachael Donovan ,  Kenneth Flack ,  Carmina Querol Esparch

IPC: B29C64/165 ,  B33Y10/00 ,  B33Y70/00 ,  C09D177/00 ,  C09D175/04 ,  B29K75/00 ,  B29K77/00

Abstract: An example of a three-dimensional (3D) printing composition includes a build material composition and a fusing agent to be applied to at least a portion of the build material composition during 3D printing. The build material composition includes one of: (i) a thermoplastic elastomer having a flow parameter characterized by a consolidation resistance value ranging from about 8 to about 30, and a tap density characterized by an n1/2 value ranging from 5 taps to 30 taps; or (ii) a polyamide-like material having a flow parameter characterized by a consolidation resistance value ranging from about 75 to about 120, and a tap density characterized by an n1/2 value ranging from 5 taps to 30 taps. The fusing agent includes an energy absorber to absorb electromagnetic radiation to coalesce the thermoplastic elastomer or the polyamide-like material in the at least the portion.

公开(公告)号：US20220379554A1

公开(公告)日：2022-12-01

申请号：US17864903

申请日：2022-07-14

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

Inventor： Kenneth Flack ,  Erica Fung ,  Carolin Fleischmann ,  Jesiska Tandy ,  Carmina Querol Esparch ,  Greg S. Long ,  Ali Emamjomeh ,  Shannon Reuben Woodruff ,  Rachael Donovan

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

Abstract: An example of a three-dimensional (3D) printing kit includes a build material composition and a fusing agent to be applied to at least a portion of the build material composition during 3D printing. The build material composition includes a semi-crystalline or amorphous thermoplastic polymer having a predicted total dimension change during 3D printing ranging from about −4% to about 9%. The fusing agent includes an energy absorber to absorb electromagnetic radiation to coalesce the semi-crystalline or amorphous thermoplastic polymer in the at least the portion. The fusing agent is a core fusing agent and the energy absorber has absorption at least at wavelengths ranging from 400 nm to 780 nm; or the fusing agent is a primer fusing agent and the energy absorber has absorption at wavelengths ranging from 800 nm to 4000 nm and has transparency at wavelengths ranging from 400 nm to 780 nm.

公开(公告)号：US20220314534A1

公开(公告)日：2022-10-06

申请号：US17633641

申请日：2019-10-11

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

Inventor： Graciela Emma Negri Jimenez ,  Emre Hiro Discekici ,  Jacob Wright ,  Shannon Reuben Woodruff

IPC: B29C64/165 ,  C09D11/107 ,  C09D11/102 ,  C09D11/023 ,  C09D183/04 ,  B33Y70/00 ,  B33Y10/00

Abstract: The present disclosure describes multi-fluid kits for three-dimensional printing, three-dimensional printing kits, and methods of making three-dimensional printed articles. In one example, a multi-fluid kit for three-dimensional printing can include a fusing agent, a hydrophobizing agent, and a hydrophilizing agent. The fusing agent can include water and an electromagnetic radiation absorber, wherein the electromagnetic radiation absorber absorbs radiation energy and converts the radiation energy to heat. The hydrophobizing agent can include water and a hydrophobic additive including a first polymer having a hydrophobic group, a monomer that is polymerizable to form a first polymer having a hydrophobic group, or a combination thereof. The hydrophilizing agent can include water and a hydrophilic additive including a second polymer having a hydrophilic group.

公开(公告)号：US11427720B2

公开(公告)日：2022-08-30

申请号：US16490917

申请日：2017-11-17

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

Inventor： Carolin Fleischmann ,  Rachael Donovan ,  Shannon Reuben Woodruff ,  Yi Feng

IPC: B33Y70/00 ,  C09D11/102 ,  B33Y10/00 ,  B29C64/165 ,  C09D11/30 ,  B29K77/00

Abstract: Compositions including polyamides and methods of employing compositions including polyamides are described herein. For instance, composition for three-dimensional (3D) printing can include a polymer build material comprising of at least two polyamides including a first polyamide and a second polyamide, where the first polyamide is present in an amount ranging of from about 95% to about 99% of a total weight of the polymer build material and where the second polyamide is present in an amount ranging of from about 1% to about 5% of the total weight of the polymer build material.

公开(公告)号：US20220267630A1

公开(公告)日：2022-08-25

申请号：US17629009

申请日：2019-09-06

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

Inventor： Erica Fung ,  Rachael Donovan ,  Jesiska Tandy ,  Shannon Reuben Woodruff ,  Emre Hiro Discekici ,  Graciela Emma Negri Jimenez ,  Alay Yemane

IPC: C09D11/50 ,  C09D11/322 ,  C09D11/328 ,  C09D11/102 ,  C09D11/037 ,  B29C64/165 ,  B33Y10/00 ,  B33Y70/00

Abstract: A three-dimensional printing kit can include a powder bed material and a fusing agent to selectively apply to the powder bed material. The powder bed material can include polymer particles and a thermochromic additive. The thermochromic additive can be chemically stable at a melting point temperature of the polymer particles, and the thermochromic additive can exhibit a color change at a color transition temperature that is below the melting point of the polymer particles. The fusing agent can include water and a radiation absorber to absorb radiation energy and convert the radiation energy to heat.

公开(公告)号：US20220154023A1

公开(公告)日：2022-05-19

申请号：US17297073

申请日：2019-08-09

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

Inventor： Emre Hiro Discekici ,  Shannon Reuben Woodruff ,  Alay Yemane

IPC: C09D11/34 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y70/10 ,  B29C64/165 ,  B33Y40/10 ,  B29C64/314 ,  B29B7/90 ,  C09D11/037 ,  C09D11/102 ,  C09D11/322

Abstract: This disclosure describes three-dimensional printing kits, methods, and systems for three-dimensional printing with directionally-dependent reflective particles. In one example, a three-dimensional printing kit can include a powder bed material and a fusing agent to selectively apply to the powder bed material. The powder bed material can include polymer particles and directionally-dependent reflective particles. The directionally-dependent reflective particles can be chemically and thermally stable at a melting point temperature of the polymer particles. The fusing agent can include water and a radiation absorber to absorb radiation energy and convert the radiation energy to heat.

公开(公告)号：US20220126507A1

公开(公告)日：2022-04-28

申请号：US17298889

申请日：2019-07-16

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

Inventor： Emre Hiro Discekici ,  Shannon Reuben Woodruff ,  Cory J. Ruud ,  Vladek Kasperchik ,  Jesiska Tandy ,  Kevin P. DeKam

IPC: B29C64/165 ,  B33Y10/00 ,  C09D11/108 ,  B33Y70/00 ,  C09D11/104 ,  C09D11/037 ,  C09D11/107 ,  B33Y30/00 ,  B29K509/02

Abstract: The present disclosure is drawn to three-dimensional printing kits, methods of making magnetic three-dimensional printed articles, and systems for three-dimensional printing. In one example, a three-dimensional printing kit can include a powder bed material, a fusing agent, and a magnetic agent. The powder bed material can include polymer particles. The fusing agent can include water and a non-magnetic radiation absorber. The non-magnetic radiation absorber can absorb radiation energy and convert the radiation energy to heat. The magnetic agent can include a dispersion of magnetic nanoparticles.

公开(公告)号：US20220119622A1

公开(公告)日：2022-04-21

申请号：US17298637

申请日：2020-04-24

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

Inventor： Emre Hiro Discekici ,  Shannon Reuben Woodruff ,  Krzysztof Nauka ,  Vladek P. Kasperchik

IPC: C08K5/25 ,  B29C64/165 ,  B33Y10/00 ,  B33Y70/10 ,  C08K3/22 ,  C08L77/02

Abstract: An example of an ultraviolet (UV) light fusing agent for three-dimensional (3D) printing includes a vehicle and a multi-functional antioxidant and UV light absorber dispersed in the vehicle. The vehicle includes water and a water miscible or water soluble organic solvent. The multi-functional antioxidant and UV light absorber includes a metal oxide particle that is to absorb UV radiation having a wavelength within a range from about 330 nm to about 405 nm and a passivating agent complexed with at least a portion of a surface of the metal oxide.

公开(公告)号：US11117318B2

公开(公告)日：2021-09-14

申请号：US16489503

申请日：2017-11-30

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

Inventor： Shannon Reuben Woodruff ,  Carolin Fleischmann ,  Geoffrey Schmid

IPC: B29C64/165 ,  B32B27/08 ,  B32B27/18 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y80/00 ,  B33Y40/20 ,  B29C64/30 ,  B29K29/00 ,  B29K77/00 ,  B29K105/00

Abstract: In an example of a method for 3D printing, a polymeric or polymeric composite build material is applied. Some of the build material is negatively patterned to define a removable build material portion and a remaining build material portion. The negatively patterning includes selectively applying an anti-coalescing polymer solution including a polymer having a pendant reactive functional group, and selectively applying an anti-coalescing crosslinker solution including a multifunctional crosslinker. The pendant reactive functional group and the multifunctional crosslinker react to form an insoluble gel network among the polymeric or polymeric composite build material in the removable build material portion. Based on a 3D object model, a layer of a final 3D object is formed from at least some of the remaining build material portion. The some of the polymeric or polymeric composite build material in the removable build material portion remains physically separated from the layer.