Hewlett-packard Development Company, L.P.

Peridot Print LLC

Laurent Herschke

Maria Del Carmen Querol Esparch

Lihua Zhao

Adekunle Olubummo

Kyle Wycoff

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.

Three-dimensional printing

This disclosure describes compositions, kits, methods, systems, and three-dimensional parts. According to an example, described herein is a polymeric powder build material comprising a thermoplastic polymer powder composition, wherein the thermoplastic polymer powder composition comprises a polypropylene block copolymer made from a polymerizing propylene and ethylene or butylene or 1-pentene or 1-hexene or 1-octene or 4-methyl-1-pentene and polypropylene homopolymers.

This disclosure describes compositions, kits, methods, systems, and three-dimensional parts. According to an example, described herein is a three-dimensional printed part made from three-dimensional printing, the three-dimensional part comprising: a thermoplastic polymer powder composition comprising 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, wherein the thermoplastic polymer powder composition has a processing window of from about 120&#xb0; C. to about 150&#xb0; C.

Material for three-dimensional printing comprising specific polypropylene block copolymer

The present disclosure relates to a build material for 3D printing. The build material comprises polymeric particles comprising polypropylene and at least one elastomer. The polymeric particles comprise a surface-active coating.

This disclosure describes compositions, kits, methods, systems, and three-dimensional parts. According to an example, described herein is a method of forming a polymeric powder build material composition for three-dimensional printing, the method comprising mixing a thermoplastic polymer powder composition, antioxidants, flow aids, a surface modifying agent, antistatic agents, and filler.

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 %.

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Sant Cugat del Valles, Spain

Laurent Herschke