Additive manufacturing support material
US12215202B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2023 |
| Grant date | Feb 4, 2025 |
| Priority date | — |
| Expiry date | May 12, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2389/04
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
This document describes a process of producing gel microparticles, which are consistent in size and morphology. Through the process of coacervation, large volumes of gel microparticle slurry can be produced by scaling up reactor vessel size. Particles can be repeatedly dehydrated and rehydrated in accordance to their environment, allowing for the storage of particles in a non-solvent such as ethanol. Gel slurries exhibit a Bingham plastic behavior in which the slurry behaves as a solid at shear stresses that are below a critical value. Upon reaching the critical shear stress, the slurry undergoes a rapid decrease in viscosity and behaves as a liquid. The rheological behavior of these slurries can be adjusted by changing the compaction processes such as centrifugation force to alter the yield-stress. The narrower distribution and reduced size of these particles allows for an increase in FRESH printing fidelity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.