Method of producing shaped cellulosic articles

US5216144A · kind A · utility

Assignee

• LENZING AKTIENGESELLSCHAFT · AT

Inventors

• Dieter Eichinger · Vöcklabruck, AT
• Raimund Jurkovic · Lenzing, AT
• Stephan Astegger · Vöcklabruck, AT
• Heinrich Firgo · Vöcklabruck, AT
• Peter Hinterholzer · Neumarkt am Wallersee, AT
• Karin Weinzierl · Vöcklabruck, AT
• Stefan Zikeli · Regau, AT

Key dates

• Filing date: Dec 6, 1991
• Grant date: Jun 1, 1993
• Expiry date: Dec 6, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L1/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Shaped cellulosic bodies and especially cellulosic fibers or filaments are produced by precipitating cellulose from a solution containing cellulose and NMMO. To allow elevated concentrations of NMMO in the precipitating bath without detriment to the properties of the fibers or filaments produced, the temperature of the precipitating bath is held at most at 0.degree. C.