公开(公告)号：US11426932B2

公开(公告)日：2022-08-30

申请号：US17043740

申请日：2018-05-15

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

Inventor： Sterling Chaffins ,  Anthony P. Holden

IPC: B29C64/165 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/268 ,  B29K75/00 ,  B29K77/00 ,  B29K105/00

Abstract: In an example of a method for reducing oxidation of a build material during three-dimensional printing, a portion of a layer of a polymeric build material is patterned by selectively applying a fusing agent on the portion. A detailing agent selectively applied on a non-patterned portion of the layer. The detailing agent includes a stabilizer to reduce oxidation of the polymeric build material. The layer is exposed to electromagnetic radiation to fuse the portion to form a 3D object layer. The stabilizer at least minimizes discoloration of the non-patterned portion.

公开(公告)号：US11642842B2

公开(公告)日：2023-05-09

申请号：US16603303

申请日：2018-01-26

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

Inventor： Sterling Chaffins ,  Anthony P. Holden ,  Katrina Donovan ,  Noemie Midrez ,  Garry Hinch

IPC: B29C64/165 ,  B33Y10/00 ,  B29C64/291 ,  B22F10/14 ,  B33Y70/10 ,  C09D11/101 ,  C09D11/102 ,  C09D11/38 ,  C09D11/54 ,  B22F12/13 ,  B22F12/63

CPC classification number: B29C64/165 ,  B22F10/14 ,  B29C64/291 ,  B33Y10/00 ,  B33Y70/10 ,  C09D11/101 ,  C09D11/102 ,  C09D11/38 ,  C09D11/54 ,  B22F12/13 ,  B22F12/63

Abstract: In an example of a method for three-dimensional (3D) printing, a build material composition is applied to form a build material layer. The build material composition includes a polymeric or polymeric composite build material, and a precipitating agent. Based on a 3D object model, a fusing agent is selectively applied on at least a portion of the build material composition. The fusing agent includes a radiation absorber, which the precipitating agent precipitates. The build material composition is exposed to radiation to fuse the at least the portion to form a layer of a 3D part.

公开(公告)号：US20210107216A1

公开(公告)日：2021-04-15

申请号：US16603303

申请日：2018-01-26

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

Inventor： Sterling Chaffins ,  Anthony P. Holden ,  Katrina Donovan ,  Noemie Midrez ,  Garry Hinch

IPC: B29C64/165 ,  B29C64/291 ,  B33Y10/00 ,  B33Y70/00 ,  B22F10/14 ,  C09D11/102 ,  C09D11/101 ,  C09D11/38 ,  C09D11/54

Abstract: In an example of a method for three-dimensional (3D) printing, a build material composition is applied to form a build material layer. The build material composition includes a polymeric or polymeric composite build material, and a precipitating agent. Based on a 3D object model, a fusing agent is selectively applied on at least a portion of the build material composition. The fusing agent includes a radiation absorber, which the precipitating agent precipitates. The build material composition is exposed to radiation to fuse the at least the portion to form a layer of a 3D part.

公开(公告)号：US20210087418A1

公开(公告)日：2021-03-25

申请号：US16603342

申请日：2018-01-26

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

Inventor： Sterling Chaffins ,  Anthony P. Holden ,  Katrina Donovan ,  Garry Hinch

IPC: C09D11/38 ,  B33Y70/00 ,  B29C64/165 ,  C09D11/102

Abstract: An example of a build material composition for three-dimensional (3D) printing includes a polymeric or polymeric composite build material and a wetting modifying agent. The wetting modifying agent is: (i) incorporated into the polymeric component of the polymeric or polymeric composite build material and changes the wetting behavior of the polymeric component; or (ii) selected from the group consisting of: a fluorotelomer; a C8-C20 alcohol; a methyltrialkyl ammonium chloride; docusate sodium salt; a polymer having a chemical structure of the polymeric component of the polymeric or polymeric composite build material modified to include a hydrophobic group or a hydrophilic group; and a combination thereof.

公开(公告)号：US11795338B2

公开(公告)日：2023-10-24

申请号：US16603342

申请日：2018-01-26

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

Inventor： Sterling Chaffins ,  Anthony P. Holden ,  Katrina Donovan ,  Garry Hinch

IPC: B29C64/165 ,  C09D11/38 ,  B33Y70/00 ,  C09D11/102 ,  B33Y10/00 ,  B29K75/00 ,  B29K105/00 ,  C08K3/34

CPC classification number: C09D11/38 ,  B29C64/165 ,  B33Y70/00 ,  C09D11/102 ,  B29K2075/00 ,  B29K2105/005 ,  B33Y10/00 ,  C08K3/346 ,  C08K2201/005 ,  C08K2201/011

Abstract: An example of a build material composition for three-dimensional (3D) printing includes a polymeric or polymeric composite build material and a wetting modifying agent. The wetting modifying agent is: (i) incorporated into the polymeric component of the polymeric or polymeric composite build material and changes the wetting behavior of the polymeric component; or (ii) selected from the group consisting of: a fluorotelomer; a C8-C20 alcohol; a methyltrialkyl ammonium chloride; docusate sodium salt; a polymer having a chemical structure of the polymeric component of the polymeric or polymeric composite build material modified to include a hydrophobic group or a hydrophilic group; and a combination thereof.

公开(公告)号：US20210197456A1

公开(公告)日：2021-07-01

申请号：US17043740

申请日：2018-05-15

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

Inventor： Sterling Chaffins ,  Anthony P. Holden

IPC: B29C64/165 ,  B29C64/268 ,  B33Y10/00 ,  B33Y70/00

Abstract: In an example of a method for reducing oxidation of a build material during three-dimensional printing, a portion of a layer of a polymeric build material is patterned by selectively applying a fusing agent on the portion. A detailing agent selectively applied on a non-patterned portion of the layer. The detailing agent includes a stabilizer to reduce oxidation of the polymeric build material. The layer is exposed to electromagnetic radiation to fuse the portion to form a 3D object layer. The stabilizer at least minimizes discoloration of the non-patterned portion.