公开(公告)号：US11008479B2

公开(公告)日：2021-05-18

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 ,  B33Y10/00 ,  B33Y30/00 ,  B29C64/165 ,  B29C64/393 ,  C09D11/033 ,  C09D11/037 ,  C09D11/30 ,  B33Y50/02 ,  B33Y70/00 ,  B29C64/112 ,  B29C64/20 ,  C09D11/101 ,  C09D11/102 ,  C09D11/328 ,  C09D11/38

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.

公开(公告)号：US10696044B2

公开(公告)日：2020-06-30

申请号：US15509774

申请日：2014-09-30

Applicant: Hewlett-Packard Development Company, L.P. ,  Purdue Research Foundation

Inventor： Elias I. Franses ,  David S. Corti ,  Yung-Jih Yang ,  Hou T. Ng ,  Yan Zhao ,  Howard S. Tom

IPC: C09D11/322 ,  B41J2/01 ,  C09D11/037 ,  C09D11/38 ,  C09D11/326 ,  C09D11/033

Abstract: Provided in one example herein is an aqueous ink composition, including: pigment particles having at least one metal oxide; an aqueous medium; and a cationic double-chain surfactant consisting a quaternary ammonium salt. Methods of making and using the ink composition are also provided.

公开(公告)号：US10647053B2

公开(公告)日：2020-05-12

申请号：US16072123

申请日：2016-05-12

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

Inventor： Kristopher J. Erickson ,  Lihua Zhao ,  Howard S. Tom ,  Aja Hartman ,  Yan Zhao ,  Andrew E. Fitzhugh

IPC: B27N5/00 ,  B29C41/22 ,  B29C67/04 ,  B29C70/28 ,  B29C71/04 ,  B29C64/112 ,  B33Y70/00 ,  B33Y10/00 ,  B33Y50/02 ,  B29C67/00 ,  B29C64/165 ,  B29C64/264

Abstract: In an example of a three-dimensional (3D) printing method, a polymeric build material is applied. A fusing agent is selectively applied on at least a portion of the polymeric build material. A mechanical tailoring agent is selectively applied on at least a region of the portion. The polymeric build material is exposed to radiation, thereby fusing the at least the portion of the polymeric build material in contact with the fusing agent to form a layer. The mechanical tailoring agent forms a composite layer in the at least the region, and the composite layer has a different mechanical property than that of an area of the layer not in contact with the mechanical tailoring agent.

公开(公告)号：US10544311B2

公开(公告)日：2020-01-28

申请号：US15100603

申请日：2014-01-29

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

Inventor： Lihua Zhao ,  Sivapackia Ganapathiappan ,  Yan Zhao ,  Krzysztof Nauka ,  Howard S. Tom ,  Hou T. Ng

IPC: C09D5/03 ,  C08L101/00 ,  C08L77/02 ,  C08L77/06 ,  B29C64/40 ,  B29C64/386 ,  B29C64/165 ,  B29C64/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00 ,  B33Y50/02 ,  B33Y70/00 ,  C08J3/12 ,  C09D177/02 ,  G06F17/50 ,  B29K77/00 ,  B29K105/00

Abstract: A polymeric powder composition for three-dimensional printing includes first, second, and third polymeric particles. The first particles, having a first average size, are present in an amount ranging from about 70 wt % to about 95 wt %. The second particles, having a second average size smaller than the first average size, are present in an amount ranging from about 0.5 wt % to about 21 wt %. The third particles, having a third average size smaller than the second average size, are present in an amount ranging from greater than 0 wt % up to about 21 wt %. Each of the first, second, and third average sizes independently ranges from 5 μm to about 100 μm. A sum of the fractional weight ratios of all of the polymeric particles in the polymeric powder composition equals 1.

公开(公告)号：US20190160534A1

公开(公告)日：2019-05-30

申请号：US16264681

申请日：2019-02-01

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

Inventor： Kristopher J. Erickson ,  Krzysztof Nauka ,  Thomas Anthony ,  Lihua Zhao ,  Howard S. Tom

IPC: B22F3/00 ,  B82B1/00 ,  C23C24/10 ,  B33Y10/00 ,  C23C18/30 ,  B82B3/00 ,  C23C24/08

Abstract: Apparatus and methods for making metal-connected particle articles. A metal containing fluid is selectively applied to a layer of particles. The metal in the fluid is used to form metal connections between particles, The metal connections are formed at temperatures below the sintering temperature of the particles in the layer of particles.

公开(公告)号：US20190152132A1

公开(公告)日：2019-05-23

申请号：US16253007

申请日：2019-01-21

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

Inventor： Krzysztof Nauka ,  Esteve Comas ,  Alejandro Manuel De Pena ,  Howard S. Tom ,  Hou T. Ng

IPC: B29C64/00 ,  B29C64/165 ,  B29C64/386

Abstract: In one example, an apparatus for generating a three-dimensional object includes an energy source to apply energy to a layer of build material to cause a first portion of the layer to coalesce and solidify, an agent distributor to selectively deliver a cooling agent onto a second portion of the layer, and a controller to control the energy source to apply energy to the layer to cause the first portion to coalesce and solidify in a first pattern and to control the agent distributor to selectively deliver the cooling agent onto the second portion of the layer in a second pattern independent of the first pattern.

公开(公告)号：US09981857B2

公开(公告)日：2018-05-29

申请号：US15816930

申请日：2017-11-17

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

Inventor： Yan Zhao ,  Howard S. Tom ,  Hou T. Ng

IPC: C01G23/053 ,  C09D11/023 ,  C09D11/102 ,  C09D11/322 ,  C09D17/00 ,  C09D7/12 ,  C09D5/02 ,  C09C1/36 ,  C09C1/00 ,  C08K3/22

CPC classification number: C01G23/053 ,  C01G23/0532 ,  C01P2004/01 ,  C01P2004/34 ,  C01P2004/62 ,  C01P2006/11 ,  C08K2003/2241 ,  C09C1/00 ,  C09C1/3676 ,  C09D5/028 ,  C09D7/61 ,  C09D11/023 ,  C09D11/102 ,  C09D11/322 ,  C09D17/00 ,  C09D17/008

Abstract: A method for manufacturing low effective density TiO2 includes providing a template having a surface. The template surface is coated with a titanium-containing compound that can be reduced to TiO2 at high temperature. The template is removed, thereby forming porous TiO2 particles. The effective density of the porous TiO2 particles is less than 4.

公开(公告)号：US20180126631A1

公开(公告)日：2018-05-10

申请号：US15568979

申请日：2015-07-23

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

Inventor： Krzysztof Nauka ,  Howard S. Tom ,  Kristopher J. Erickson ,  Lihua Zhao ,  Sivapackia Ganapathiappan

IPC: B29C64/153 ,  B33Y70/00 ,  C08K3/22 ,  C08K5/00 ,  C08L101/12 ,  C08L77/02 ,  C08L71/12

CPC classification number: B29C64/153 ,  B33Y70/00 ,  C08K3/20 ,  C08K3/22 ,  C08K3/30 ,  C08K3/32 ,  C08K5/00 ,  C08K5/0091 ,  C08K2003/2248 ,  C08K2201/005 ,  C08L71/12 ,  C08L77/02 ,  C08L101/00 ,  C08L101/12

Abstract: A three-dimensional printing build material composition includes a polymer particle, and a radiation absorbing additive mixed with the polymer particle. The radiation absorbing additive has a particle size ranging from about 1 μm to about 100 μm, and the radiation absorbing additive is to absorb incident radiation having wavelengths ranging from 700 nm to 10 μm.

公开(公告)号：US20170247555A1

公开(公告)日：2017-08-31

申请号：US15509774

申请日：2014-09-30

Applicant: Hewlett-Packard Development Company, L.P. ,  Purdue Research Foundation

Inventor： Elias I. Franses ,  David S. Corti ,  Yung-Jih Yang ,  Hou T. Ng ,  Yan Zhao ,  Howard S. Tom

IPC: C09D11/322 ,  B41J2/01 ,  C09D11/38 ,  C09D11/037 ,  C09D11/033

Abstract: Provided in one example herein is an aqueous ink composition, comprising: pigment particles comprising at least one metal oxide; an aqueous medium; and a cationic double-chain surfactant comprising a quaternary ammonium salt. Methods of making and using the ink composition are also provided.

公开(公告)号：US20170225396A1

公开(公告)日：2017-08-10

申请号：US15121730

申请日：2014-04-30

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

Inventor： Howard S. Tom ,  Hou T. Ng ,  Lihua Zhao ,  Sivapackia Ganapathiappan ,  Krzysztof Nauka ,  Yan Zhao

IPC: B29C67/00 ,  B33Y70/00 ,  B33Y10/00

CPC classification number: B29C64/165 ,  B29K2105/0005 ,  B29K2105/0011 ,  B29K2105/251 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y70/00

Abstract: In a 3D printing method, a sinterable material is applied and heated to a temperature ranging from about 50° C. to about 400° C. A coalescent agent is selectively applied on a portion of the sinterable material, and a modifying agent is selectively applied on the portion and/or on another portion of the sinterable material. The modifying agent consists of an inorganic salt, a surfactant, a co-solvent, a humectant, a biocide, and water. The sinterable material is exposed to radiation, whereby the coalescent agent at least partially cures the portion of the sinterable material in contact with the coalescent agent, and the modifying agent i) reduces curing of the portion of the sinterable material in contact with both the coalescent agent and the modifying agent ii) prevents curing of the other portion of the sinterable material in contact with the modifying agent, or iii) both i and ii.