Cellulosic molding process and cellulosic moldings

US5993710A · kind A · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Peter Weigel · Borchen, DE
• Hans-Peter Fink · Teltow, DE
• Hans-Joachim Purz · Teltow, DE
• Konrad Frigge · Potsdam, DE
• Ulrich Wachsmann · Elsenfeld, DE
• Martin Nywalt · Obernburg, DE

Key dates

• Filing date: Jan 9, 1998
• Grant date: Nov 30, 1999
• Expiry date: Jan 9, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2301/02
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The invention pertains to a process for manufacturing cellulose molded mers wherein a solution dissolved in amine oxides is shaped in a nozzle and the shaped solution is led after an air gap into a precipitation medium. The molded solution is passed successively through at least two precepitation media, which are selected so that a slower coagualation takes place at least in the first precipitation medium than the final precipitation medium.