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    THREE-DIMENSIONAL PRINTING
    1.
    发明申请
    THREE-DIMENSIONAL PRINTING 审中-公开

    公开(公告)号：WO2021010995A1

    公开(公告)日：2021-01-21

    申请号：PCT/US2019/042221

    申请日：2019-07-17

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

    Inventor： WYCOFF, Kyle ,  OLUBUMMO, Adekunle ,  QUEROL ESPARCH, Maria del Carmen ,  HERSCHKE, Laurent ,  ZHAO, Lihua

    IPC: B29C64/165 ,  B29C64/188 ,  B33Y80/00 ,  B33Y70/10 ,  B33Y10/00

    Abstract: A 3D printing kit can include a powder bed material comprising from about 80 wt% to 100 wt% polymer particles, a fusing agent to selectively apply to the powder bed material, and a hardener to selectively apply to the powder bed material. The polymeric particles can include a polyalkylene backbone with both ethylene and propylene polymerized monomeric units with from 2 mol% to 15 mol% of the polymerized monomeric units include a grafted side chain having an epoxide moiety. The fusing agent can include water and a radiation absorber that absorbs electromagnetic energy and converts the electromagnetic energy to heat. The hardener can be present in the fusing agent or can be included in a hardening agent that is separate from the fusing agent.

    PARTICULATE BUILD MATERIALS FOR THREE-DIMENSIONAL PRINTING
    2.
    发明申请
    PARTICULATE BUILD MATERIALS FOR THREE-DIMENSIONAL PRINTING 审中-公开

    公开(公告)号：WO2022060344A1

    公开(公告)日：2022-03-24

    申请号：PCT/US2020/050824

    申请日：2020-09-15

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

    Inventor： OLUBUMMO, Adekunle ,  ZHAO, Lihua ,  HERSCHKE, Laurent

    IPC: B29C64/165 ,  B33Y10/00 ,  B33Y70/10 ,  C08F290/04

    Abstract: A particulate build material for three-dimensional printing can include from about 80 wt% to 100 wt% polymer particles having an average particle size from about 10 µm to about 125 µm. The polymer particles can have a polyolefin polymer backbone with from about 90 mol% to 100 mol% polypropylene polymeric units and from 0 mol% to about 10 mol% polyethylene polymeric units. The polymer particles can further include a crosslinkable component in the form of a maleic anhydride-containing side chain appended to the polyolefin polymer backbone, a thiol-containing side chain appended to the polyolefin polymer backbone, a glycidyl polyhedral oligomeric silsesquioxane compounded with the polyolefin polymer backbone, or a combination thereof.

    THREE-DIMENSIONAL PRINTING
    3.
    发明申请
    THREE-DIMENSIONAL PRINTING 审中-公开

    公开(公告)号：WO2019182579A1

    公开(公告)日：2019-09-26

    申请号：PCT/US2018/023490

    申请日：2018-03-21

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

    Inventor： QUEROL ESPARCH, Maria del Carmen ,  HERSCHKE, Laurent

    IPC: B29C64/165 ,  C08L23/12 ,  C08K3/22 ,  C08K3/36 ,  C08K3/14 ,  C08K3/40 ,  B33Y70/00 ,  B33Y10/00

    Abstract: This disclosure describes compositions, kits, methods, systems, and three- dimensional parts. According to an example, described herein is a threedimensional printing composition comprising: a polymeric powder build material comprising a thermoplastic polymer powder composition, wherein the thermoplastic polymer powder composition comprises: (a) at least 50 wt% of a C3 polyolefin, or a mixture of two or more polyolefins including at least 60 wt% of a C3 polyolefin based on the total weight of the mixture of the two or more polyolefins, (b) 0.1 to 1 wt% antioxidants, (c) 0.1 to 5 wt% flow aids, (d) 0-10 wt% of a surface modifying agent, (e) 0.05-wt%-10 wt% antistatic agents, (f) 2 wt% to 40 wt% filler, wherein the total of (a) to (f) is 100 wt%.

    THREE-DIMENSIONAL PRINTING WITH POLYOLEFIN AND METAL OR METAL OXIDE BUILD MATERIALS
    6.
    发明申请
    THREE-DIMENSIONAL PRINTING WITH POLYOLEFIN AND METAL OR METAL OXIDE BUILD MATERIALS 审中-公开

    公开(公告)号：WO2022046249A1

    公开(公告)日：2022-03-03

    申请号：PCT/US2021/037934

    申请日：2021-06-17

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

    Inventor： HERSCHKE, Laurent ,  QUEROL ESPARCH, Maria del Carmen ,  GIMENEZ, Jerome ,  DEME, Florian

    IPC: B29C64/165 ,  B29C64/20 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y70/10 ,  B82Y30/00

    Abstract: The present disclosure describes methods and systems for making three-dimensional printed objects. In one example, a method of making a three-dimensional printed object can include iteratively applying individual particulate build material layers to a powder bed. The particulate build material can include polymer particles that include a polyolefin and first nanoparticles compounded with the polyolefin such that the first nanoparticles are embedded within the polymer particles. Second nanoparticles can be dry blended with the polymer particles. The first nanoparticles and second nanoparticles can include metal or metal oxide. The first and second nanoparticles can have a higher thermal conductivity that the polyolefin. A fusing agent including water and an electromagnetic radiation absorber can be selectively jetted onto the individual particulate build material layers. The powder bed can be exposed to energy to selectively fuse the polymer particles in contact with the electromagnetic radiation absorber.

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