公开(公告)号：US20240229303A1

公开(公告)日：2024-07-11

申请号：US18292610

申请日：2022-07-22

Applicant: Lenzing Aktiengesellschaft

Inventor： Thomas RÖDER ,  Friedrich SUCHOMEL ,  Christian MAYRHOFER-HUBER ,  Markus DUSCHLBAUER

IPC: D01F2/02 ,  D01D5/06 ,  D01D5/26 ,  D01D10/06 ,  D01F11/02 ,  D04H1/067 ,  D04H1/28

CPC classification number: D01F2/02 ,  D01D5/06 ,  D01D5/26 ,  D01D10/06 ,  D01F11/02 ,  D04H1/067 ,  D04H1/28 ,  D10B2201/22

Abstract: A method and a production facility for producing regenerated cellulosic fibers. A spinning solution is extruded into a coagulation bath which contains a salt and preferably an alkali. The spinning solution comprises cellulose dissolved in an aqueous solvent comprising NaOH and ZnO and the coagulation bath has a pH-value of at least seven. The processing facility comprises a cutter to cut the fiber tow in an undried state into cut fibers, a fleece-forming device for suspending the cut fibers and collecting them in form of a non-woven fiber layer, and at least on pressing device for pressing the non-woven fiber layer, thereby imposing a natural crimp on the fibers.

公开(公告)号：US20250084566A1

公开(公告)日：2025-03-13

申请号：US18292781

申请日：2022-07-22

Applicant: Lenzing Aktiengesellschaft

Inventor： Thomas RÖDER ,  Friedrich SUCHOMEL ,  Christian MAYRHOFER-HUBER ,  Makus DUCHLBAUER

IPC: D01F2/02 ,  D01D5/06 ,  D01D5/26 ,  D01D10/06 ,  D01D13/00

Abstract: A method and a production facility for producing regenerated cellulosic fibers. A spinning solution is extruded into a coagulation bath which contains a salt and preferably an alkali. The spinning solution comprises cellulose dissolved in an aqueous solvent comprising NaOH and ZnO and the coagulation bath has a pH-value of at least seven. The fibers in the fiber tow are fixated and stretched to essentially their final cellulose specific diameter before being cut to staple fibers in an undried state.