Process for the preparation of fibrillated fiber structures

US4369156A · kind A · utility

Assignee

• Akzona Incorporated · US

Inventors

• Nikolaus Mathes · Höchst im Odenwald, DE
• Friedbert Wechs · Bad Mergentheim, DE

Key dates

• Filing date: Feb 25, 1980
• Grant date: Jan 18, 1983
• Expiry date: Feb 25, 2000

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01F8/14
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Fiber structures such as staple fibers, filaments, yarns as well as textile sheet structures such as woven or knitted fabrics as well as non-woven fabrics and the like made from multicomponent fibers of the matrix-segment type having in their cross sections a plurality of segments arranged peripherally without being fully surrounded by the matrix and being composed of polyalkylene terephthalate and copolyamides based on .epsilon.-caprolactam and hexamethylene diamine/adipic acid salt, are split by treatment with liquid or vaporous water. The difference in shrinkage between copolyamide and polyalkylene terephthalate in water is temporarily at least 10%. Corresponding short-staple fibers are particularly well suited for making wet-laid non-woven fabrics. The water used for treatment of the fiber structures may contain inorganic salts.