Lenzing Aktiengesellschaft

Andreas Gressenbauer

Christoph Schrempf

Martin Neunteufel

Ernst Reiter

Johann Pillichshammer

Franz Gugerell

A process and a system for washing filaments. A filament to be washed and a washing liquid are passed in a countercurrent. The process and the system include two washing stages. In each washing stage the filament is brought into contact with a fresh washing liquid by a washing element in such a way that only an amount of the washing liquid is transferred to the filament, which adheres to the filament itself, for example by adhesion. The washing liquid is then separated from the filament again in each washing stage, and a separated washing liquid is collected in such a way that it is not mixed with the separated washing liquid from other washing stages of the process but is used as the fresh washing liquid in the washing element of a preceding washing stage.

Counter-flow washing

A method of producing lyocell filaments employs a steam heatable spinneret having a rectangular shape with an aspect ratio of more than 2 and comprising at least a top housing and a nozzle frame. The spinneret is heated and used for spinning cellulosic filaments from a cellulose solution in a solvent. A lyocell process employs the spinneret.

Spinneret, method of heating a spinneret and lyocell process

The present invention provides a process for the viable production of lyocell cellulose continuous filament yarns at very high production speeds.

Cellulose filament process

The present invention provides a process for the viable removal of liquid from lyocell cellulose continuous filament yarns at very high production speeds.

Process for liquid removal from cellulose filaments yarns or fibers

The present invention provides a process for the viable production of lyocell cellulose continuous filament yarns.

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Schörfling am Attersee, Austria

Andreas Gressenbauer