TY - JOUR A1 - Demski, Nils Maximilian A1 - Seidlitz, Holger A1 - Kuke, Felix A1 - Dorn, Oliver Niklas A1 - Zoglauer, Janina A1 - Hückstaedt, Tobias A1 - Kamm, Paul Hans A1 - García-Moreno, Francisco A1 - Kremp, Noah A1 - Dreyer, Christian A1 - Oberschmidt, Dirk T1 - Flow-Line-Reducing Tetrahedral Metal Effect Pigments for Injection Molding: A Yield-Rate-Improved Particle Manufacturing Method Based on Soft UVImprint Lithography JF - Polymers N2 - This publication presents an improved manufacturing method for tetrahedral metal effect pigment particles that demonstrates reduced flowlines in injection-molded polymer components compared with conventional platelet-shaped pigment particles. The previously published cold forming process for tetrahedral particles, made entirely from aluminum, faced manufacturing challenges, resulting in a high reject rate due to particle adhesion to the micro-structured mold roller. In contrast, this study introduces a new manufacturing method for tetrahedral particles, now consisting of metallized UV-cured thermoset polymer. These particles, dispersed in amorphous matrix thermoplastics, have shown to maintain their shape during the injection molding process. The manufacturing technique for these novel particles is based on UV imprint lithography, omitting the reject rates compared with the previously presented cold rolling process of tetrahedral full aluminum particles. Thus, the novel manufacturing technique for tetrahedral pigment particles shows increased potential for automation through roll-to-roll manufacturing in the future. KW - flowline KW - injection molding KW - metal effect pigment KW - tetrahedral polymer particle KW - weld line Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-20850 SN - 2073-4360 VL - 17 IS - 19 PB - MDPI ER -