Processes for preparing thermostable fibers and filaments

US4524041A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Walter Fester · Königstein, DE
• Bernd Huber · Schorndorf, DE

Key dates

• Filing date: Mar 7, 1983
• Grant date: Jun 18, 1985
• Expiry date: Mar 7, 2003

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01F9/22
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to continuous processes for preparing dimethylformamide-insoluble acrylic filaments and fibers which incur a weight loss of at most 20, preferably 15% on being heated up to 400.degree. C., by spinning appropriate polymer solutions, treating the filament bundles obtained before the first drying or heating stage in a continuous manner with an aqueous solution containing copper(I) ions, thermally fixing the copper content, and heating the bundles to 200.degree. to 350.degree. C.