Process for the manufacture of hydrophilic polyolefin fibers containing inorganic pigment

US4013617A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Wolfgang Gordon · Hofheim, DE
• Hans Joachim Leugering · Altötting, DE
• Horst Schaefer

Key dates

• Filing date: May 16, 1975
• Grant date: Mar 22, 1977
• Expiry date: May 16, 1995

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H13/14
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Hydrophilic polyolefin fibers containing inorganic pigments are obtained by means of flash evaporation of a superheated suspension, which is under at least autogenous pressure. The suspension comprises a dispersion of a hydrophobized inorganic pigment in an emulsion prepared from a solution of a polyolefin in an easily boiling solvent and an aqueous solution of a hydrophilizing agent. The suspension is passed through a nozzle into a low pressure zone to form pigmented fibers.