Process for the production of hydrophilic fibres

US4239722A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Ulrich Reinehr · Dormagen, DE
• Herman-Josef Jungverdorben · Grevenbroich, DE
• Toni Herbertz · Dormagen, DE
• Joachim Dross · Dormagen, DE
• Rolf-Burkhard Hirsch · Dormagen, DE

Key dates

• Filing date: Dec 9, 1977
• Grant date: Dec 16, 1980
• Expiry date: Dec 9, 1997

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01F1/02
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a process for the production of hydrophilic filaments and fibers from filament-forming synthetic polymers by spinning a solution which, in addition to a suitable solvent, contains from 5 to 50% by weight, based on the solvent and solids, of a substance which is essentially a non-solvent for the polymer, has a higher boiling point than the solvent used and is readily miscible with the spinning solvent and with a liquid suitable as a washing liquid for the filaments, and subsequently washing this substance out of the filaments, wherein a suspension is initially prepared at room temperature from the solvent, the polymer and the substance, the suspension thus prepared is subsequently heated, left for at least one minute and at most 15 minutes at a temperature of at least 30.degree. C. and of at most 60.degree. C. above the temperature at which the suspension becomes optically homogeneous, spinning the solution to form filaments or fibers and washing the said substance out of the filaments or fibers.