ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,215,220, issued on Feb. 4, was assigned to ARKEMA FRANCE (Colombes, France).
"3-D printed semi-crystalline and amorphous polymer articles" was invented by David Shin-Ren Liu (Bala Cynwyd, Pa.), Mark A. Aubart (West Chester, Pa.) and Sara Reynaud (King of Prussia, Pa.).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to 3D printed parts made with thermoplastic polymers having a low stiffening temperature. 3D printed parts of the invention have very good Z layer adhesion, have a high elongation at break in the Z direction, preferably of more than 50 percent, and have at least an 80 percent ratio of Z to XY stress at yield or at break. Th...