公开(公告)号：US20210069981A1

公开(公告)日：2021-03-11

申请号：US16771763

申请日：2018-12-27

Applicant: Arkema Inc.

Inventor： Azaz VAHORA ,  James Joseph HENRY ,  David Shin-Ren LIU

IPC: B29C64/314 ,  B33Y10/00 ,  B33Y40/10 ,  B33Y70/00 ,  B29C64/118 ,  D01D5/247 ,  D01F1/08 ,  D01D5/34

Abstract: The invention relates to thermoplastic filament for use in 3-D printers, in which the core of the filament is non-solid or mono-filament. The filament may contain a multitude of small micro-voids, (a micro foam), be a foam-core structure, be hollow, or have a monofilament core. The filament of the invention is especially useful with crystalline and semi-crystalline polymers, and reduces the negative effect of filament voids, formed by shrinkage during the cooling of the filament.