Method for spinning a polybenzazole fiber

US5296185A · kind A · utility

Assignee

• THE DOW CHEMICAL COMPANY · US

Inventors

• Chieh-Chun Chau · Midland, US
• Timothy L. Faley · Midland, US
• Michael E. Mills · Midland, US
• Masaru Nakagawa · Yokohama, JP
• Timothy Rehg · Tecate Mission Road, US
• Myrna Serrano · Midland, US
• Ravi B. Shanker · Midland, US
• George J. Quarderer · Midland, US
• Yoshihiko Teramoto · Toyohashi, JP

Key dates

• Filing date: Dec 3, 1992
• Grant date: Mar 22, 1994
• Expiry date: Dec 3, 2012

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01F6/74
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Polybenzazole polymer dopes are spun into fibers at high speed by passing through a spinneret with proper selection of hole geometry, followed by spin-drawing to a spin-draw ratio of at least 20, washing, taking up and drying. The take up speed is at least about 150 meters per minute, and the fibers are spun in at least 10 km lengths without a break.