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METHODS FOR 3D PRINTING OF POLY-4-HYDROXYBUTYRATE AND COPOLYMERS

Methods to fabricate objects by 3D printing of poly-4-hydroxybutyrate (P4HB) and copolymers thereof have been developed. In one method, these objects are produced by continuous fused filament fabrication using an apparatus and conditions that overcome the problems of poor feeding of the filament resulting from the low softening temperature of the filament and heat creep along the fed filament. Methods using an apparatus including a heat sink, a melt tube, a heating block and nozzle, and a transition zone between the heat sink and heating block, with the melt tube extending through the heat sink, transition zone, and heat block to the nozzle are disclosed. 3D objects are also printed by fused pellet deposition (FPD), melt extrusion deposition (MED), selective laser melting (SLM), printing of slurries and solutions using a coagulation bath, and printing using a binding solution and polymer granules.


» Number: US2024149523A1 (A1)

» Publication Date: 09/05/2024

» Applicant: TEPHA INC?[US]

» Inventor: LIMEM SKANDER?[US]; HARUN RESHAD BIN?[US] (3)

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