Process of making cellulose fibres

US5698151A · kind A · utility

Assignee

• LENZING AKTIENGESELLSCHAFT · AT

Inventors

• Stefan Zikeli · Regau, AT
• Friedrich Ecker · Vöcklabruck, AT
• Franz Schwenninger · Lenzing, AT
• Raimund Jurkovic · Lenzing, AT
• Hartmut Ruf · Rötteln, DE

Key dates

• Filing date: Mar 14, 1994
• Grant date: Dec 16, 1997
• Expiry date: Mar 14, 2014

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01F2/00
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

To prepare cellulose fibres, a solution of cellulose in a tertiary amine-oxide is shaped in hot condition to give filaments, the filaments are cooled and then introduced into a precipitation bath in order to precipitate the dissolved cellulose, whereby the shaped solution is exposed to an essentially laminar gas stream (FIG. 2a) for cooling before introduction into the precipitation bath.