Three-dimensional printing

US11890809B2 · kind B2 · utility

Assignee

• HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. · US

Inventors

• Kyle Wycoff · Palo Alto, US
• Adekunle Olubummo · Palo Alto, US
• Maria del Carmen Querol Esparch · Sant Cugat del Vallès, ES
• Laurent Herschke · Sant Cugat del Vallès, ES
• Lihua Zhao · Palo Alto, US

Key dates

• Filing date: Jul 17, 2019
• Grant date: Feb 6, 2024
• Expiry date: Nov 9, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2023/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

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.