公开(公告)号：US20230191696A1

公开(公告)日：2023-06-22

申请号：US18108609

申请日：2023-02-11

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

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

IPC: B29C64/165 ,  B33Y10/00 ,  B29C64/291 ,  B29C64/336 ,  C04B35/636 ,  C04B35/634 ,  B33Y40/20 ,  B33Y70/10 ,  B22F10/16 ,  B33Y50/02 ,  B28B1/00

CPC classification number: B29C64/165 ,  B33Y10/00 ,  B29C64/291 ,  B29C64/336 ,  C04B35/636 ,  C04B35/634 ,  C04B35/63432 ,  C04B35/63468 ,  C04B35/63408 ,  C04B35/63444 ,  C04B35/63488 ,  B33Y40/20 ,  B33Y70/10 ,  B22F10/16 ,  B33Y50/02 ,  B28B1/001 ,  C04B2235/6026

Abstract: According to an example, a composition may include a high melt temperature build material in the form of a powder; a first low melt temperature binder in the form of a powder; and a second low melt temperature binder in the form of a powder; and in which the first low melt temperature binder melts at a temperature that is different from the second low melt temperature binder.

公开(公告)号：US20210284858A1

公开(公告)日：2021-09-16

申请号：US16488662

申请日：2017-10-24

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

Inventor： Paul Olubummo ,  Lihua Zhao ,  Aja Hartman ,  Howard S. Tom

IPC: C09D11/38 ,  C09D11/033 ,  C07F15/04 ,  B33Y70/00 ,  B33Y40/10 ,  B29C64/314

Abstract: An example of a fusing agent includes a metal bis(dithiolene) salt, a polar aprotic solvent, and a balance of water. An example of a method for making an example of the fusing agent includes adding a metal bis(dithiolene) salt into a liquid vehicle including at least a polar aprotic solvent and water.

公开(公告)号：US10857733B2

公开(公告)日：2020-12-08

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 ,  B29C64/165 ,  B29C64/291 ,  B29C64/393 ,  C09D11/50 ,  B33Y70/00 ,  B33Y10/00

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：US10583612B2

公开(公告)日：2020-03-10

申请号：US15100584

申请日：2014-01-29

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

Inventor： Sivapackia Ganapathiappan ,  Howard S. Tom ,  Hou T. Ng

IPC: B29C67/00 ,  B29C67/04 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/165 ,  B29C64/386 ,  B29C64/40 ,  B29C64/00 ,  A01N43/80 ,  C09B47/04 ,  B29K105/16

Abstract: In a 3D printing method, a coalescent dispersion for forming a 3D object is selected. The dispersion includes an aqueous vehicle and an infrared or near-infrared binding agent dissolved or dispersed therein. The binding agent is a phthalocyanine having a polar group attached to each side chain or a naphthalocyanine having a polar group attached to each side chain. A sinterable material is deposited and heated to a temperature ranging from about 50 C to about 350 C. The dispersion is selectively applied on at least a portion of the sinterable material. The sinterable material and the dispersion applied thereon are exposed to infrared or near-infrared radiation. The binding agent absorbs the radiation and converts it to thermal energy. At least the portion of the sinterable material in contact with the binding agent is at least cured to form a first layer of the 3D object.

公开(公告)号：US10434708B2

公开(公告)日：2019-10-08

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: B29C67/04 ,  B33Y10/00 ,  B29C64/165 ,  B33Y30/00 ,  B33Y70/00 ,  B29K105/00

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.

公开(公告)号：US20190030788A1

公开(公告)日：2019-01-31

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: B29C64/112 ,  B29C64/264 ,  B33Y50/02 ,  B33Y10/00 ,  B33Y70/00

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：US20180272601A1

公开(公告)日：2018-09-27

申请号：US15763200

申请日：2015-10-29

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

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

IPC: B29C64/165 ,  B33Y10/00 ,  B33Y30/00 ,  B29C64/20 ,  B29C64/393 ,  B33Y50/02

CPC classification number: B29C64/165 ,  B22F3/008 ,  B22F2999/00 ,  B29C64/20 ,  B29C64/393 ,  B29C67/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y50/02 ,  B33Y70/00 ,  B33Y80/00 ,  C09B47/065 ,  C09B47/0678 ,  C09B47/24 ,  B22F1/007 ,  B22F1/0074 ,  B22F1/0018

Abstract: In an example of a method for forming three-dimensional (3D) printed electronics, a build material is applied. A fusing agent is selectively applied on at least a portion of the build material. The build material is exposed to radiation and the portion of the build material in contact with the fusing agent fuses to form a layer. An electronic agent is selectively applied on at least a portion of the layer, which imparts an electronic property to the at least the portion of the layer.

公开(公告)号：US20170247553A1

公开(公告)日：2017-08-31

申请号：US15507584

申请日：2014-09-26

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

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

IPC: C09D11/037 ,  C09D11/50 ,  B33Y70/00 ,  C09D11/033 ,  B29C67/00 ,  B33Y10/00

CPC classification number: C09D11/037 ,  B29C64/165 ,  B33Y10/00 ,  B33Y70/00 ,  C09D11/033 ,  C09D11/322 ,  C09D11/328 ,  C09D11/50

Abstract: The present disclosure is drawn to coalescent inks and material sets for 3D printing. The coalescent ink can include a water-soluble near-infrared dye having a peak absorption wavelength from 800 nm to 1400 nm. The coalescent ink can also contain water.

公开(公告)号：US09740131B2

公开(公告)日：2017-08-22

申请号：US15107912

申请日：2014-02-20

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

Inventor： Hou T. Ng ,  Howard S. Tom ,  Albert Teishev

IPC: G03G9/08 ,  G03G9/12 ,  C09D11/037 ,  G03G9/125 ,  G03G9/135 ,  G03G9/13

CPC classification number: G03G9/122 ,  C09D11/037 ,  G03G9/0804 ,  G03G9/125 ,  G03G9/132 ,  G03G9/135

Abstract: A method of manufacturing a liquid electrophotographic ink concentrate includes: milling a mixture comprising ink pigments and polyamine-based dispersants in the presence of milling media to produce nano-scale ink pigments having an average particle size of less than 100 nanometers; and attaching at least one nano-scale ink pigment near surfaces of a base resin particle to form a pigment-resin composition.

公开(公告)号：US20160312037A1

公开(公告)日：2016-10-27

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 ,  B33Y10/00 ,  B33Y30/00 ,  G06F17/50 ,  B33Y70/00 ,  B33Y50/00 ,  C09D177/02 ,  C08J3/12 ,  B29C67/00 ,  B33Y50/02

CPC classification number: C09D5/031 ,  B29C64/00 ,  B29C64/165 ,  B29C64/386 ,  B29C64/40 ,  B29K2077/00 ,  B29K2105/251 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00 ,  B33Y50/02 ,  B33Y70/00 ,  C08J3/12 ,  C08J2377/02 ,  C08L77/02 ,  C08L77/06 ,  C08L101/00 ,  C08L2205/025 ,  C09D177/02 ,  G06F17/5009

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

Abstract translation: 用于三维印刷的聚合物粉末组合物包括第一，第二和第三聚合物颗粒。 具有第一平均尺寸的第一颗粒以约70重量％至约95重量％的量存在。 具有小于第一平均尺寸的第二平均尺寸的第二颗粒以约0.5重量％至约21重量％的量存在。 具有小于第二平均尺寸的第三平均尺寸的第三颗粒以大于0重量％至约21重量％的量存在。 第一，第二和第三平均尺寸中的每一个独立地在5μm至约100μm的范围内。 聚合物粉末组合物中所有聚合物颗粒的分数重量比的总和等于