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    THREE-DIMENSIONAL PRINTING
    11.
    发明申请
    THREE-DIMENSIONAL PRINTING 审中-公开

    公开(公告)号：US20180104894A1

    公开(公告)日：2018-04-19

    申请号：US15845850

    申请日：2017-12-18

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

    Inventor： Erica Fung ,  Yi Feng

    IPC: B29C64/165 ,  B33Y10/00 ,  B33Y70/00 ,  C08K3/04

    CPC classification number: B29C64/165 ,  B29K2077/00 ,  B29K2105/0005 ,  B29K2105/005 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y70/00 ,  B33Y80/00 ,  C08K3/04

    Abstract: Methods and compositions of three-dimensional printing are described herein. In an example, a method for three-dimensional printing can comprise: (i) a powder bed material being deposited, wherein the powder bed material comprises a polyimide-11 powder having an average particle size of from about 20 μm to about 120 μm, wherein the polyamide-11 powder has a solution viscosity of from about 1.75 to about 1.9 at 25° C. based on ASTM using m-cresol as solvent; (ii) a fusing agent being selectively applied on a first portion of the powder bed material, wherein the fusing agent comprises an energy absorber to absorb electromagnetic radiation (IR) to melt or fuse at least a portion of the polyamide-11 powder in areas covered by the fusing agent, and (iii) (i) and (ii) repeated at least once.

    THREE-DIMENSIONAL PRINTING
    15.
    发明申请
    THREE-DIMENSIONAL PRINTING 有权

    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.

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