公开(公告)号：US20220402215A1

公开(公告)日：2022-12-22

申请号：US17777546

申请日：2020-11-17

Applicant: Arkema Inc.

Inventor： David S. LIU ,  Mary K. CALVIN ,  Evan J. FISHER ,  Mark A. AUBART ,  Jing-Han WANG

IPC: B29C64/40 ,  B29C64/112 ,  C08L33/12 ,  C08L27/16 ,  C08L77/00 ,  C08G65/00

Abstract: The use of compatible, semi-miscible or miscible polymer compositions as support structures for the 3D printing of objects, including those made from polyether-block-amide copolymers such as PEBAX® block copolymers from Arkema, polyamides such as RILSAN® polyamides from Arkema, polyether ketone ketone such as KEPSTAN® PEKK from Arkema, and fluoropolymers, such a KYNAR® PVDF from Arkema, especially objects of polyvinylidene fluoride and its copolymers. One particularly useful miscible polymer is an acrylic polymer, which is miscible with the fluoropolymer in the melt. The support structure composition provides the needed adhesion to the build plate and to the printed object and support strength during the 3D printing process, yet it is removable after the fluoropolymer object has cooled. The support polymer composition is selected to be stiff and low warping, yet flexible enough to be formed into filaments.

公开(公告)号：US20200276760A1

公开(公告)日：2020-09-03

申请号：US16646192

申请日：2018-09-14

Applicant: Arkema Inc.

Inventor： Timothy A. SPAHR ,  Bruce CLAY ,  David S. LIU ,  Julien JOUANNEAU

IPC: B29C64/30 ,  B29C64/118 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y70/00

Abstract: The present invention is directed to material extrusion additive manufacturing processes, including fused filament fabrication, used to manufacture improved parts, devices, and prototypes using polyetherketoneketones (“PEKK”) and polyetheretherketones (“PEEK”). Using the improved processes of the invention, PEKK or PEEK polymer readily is 3D printed by FFF such that it crystallizes slowly enough during deposition for the resulting part to remain mostly or substantially amorphous during printing and thus have low percentage and/or more uniform shrinkage per layer and little to no warping from the base during print, and yet fast enough so that the resulting part crystallizes in post-print processing without substantial or any loss of its printed structure.