Akzo Nobel N.v.

Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Ulrich Wigand Wachsmann

Hans-Jurgen Pitowski

Derek Budgell

Hans-Peter Fink

Peter Weigel

Konrad Frigge

Hans-Georg Connor

Hans Joachim Purz

Richard A Kruger

Wilhelm Kramer

Hans-Juergen Pitowski

Martin Nywalt

A process for producing cellulosic shaped objects includes extruding and coagulating a solution of chemical wood pulp in a tertiary amine oxide, and possibly a liquid that does not dissolve wood pulp and is miscible with the tertiary amine oxide, the solution capable of being shaped into objects, the process of producing the shapeable solution employing a first wood pulp with a higher degree of polymerization and a second wood pulp with a lower degree of polymerization, and whereby initially a solution of the first wood pulp with a higher degree of polymerization in the tertiary amine oxide and possibly non-dissolving liquid, and a composition containing the second wood pulp with a lower degree of polymerization, tertiary amine oxide, and possibly non-dissolving liquid, are prepared separately, and the solution and composition are subsequently at least mixed to obtain the shapeable solution.

Process for producing cellulosic shaped objects

Cellulosic fibers made from a solution of cellulose in a tertiary amine oxide and optionally water and which have a low tendency to fibrillate are produced by coagulating the fibers in at least two stages. The residence time of the fibers in the first coagulation stage is adjusted so that on leaving the first coagulation stage only the adhesiveness of the surface of the solution formed into fibers has been counteracted. In subsequent coagulation stages, the fibers are kept in a slack state. On leaving the final coagulation stage, the fibers have been thoroughly coagulated. The cellulosic fibers have a new structure and apart from a very low tendency to fibrillate, they possess a high dyeing level.

Process for the manufacture of cellulosic fibers; and cellulosic fibers

Cellulosic molding process and cellulosic moldings

Method of producing in water-containing celluose solutions in

Solvent-spun cellulose filaments

Growing community of inventors

Elsenfeld, Germany

Ulrich Wigand Wachsmann