Filaments and fibers having discontinuous cavities

US4164603A · kind A · utility

Assignee

• Akzona Incorporated · US

Inventors

• Erhard Siggel · Lützelbach, DE
• Gerhard Wick · Obernburg, DE
• Heinz Linhart · Zell am Harmersbach, DE
• Erich Kessler · Kelsterbach, DE

Key dates

• Filing date: Nov 4, 1976
• Grant date: Aug 14, 1979
• Expiry date: Nov 4, 1996

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2975
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A filament of a thermoplastic synthetic polymer having a plurality of adjacent, separate discontinuous cavities is made by a process wherein a silicone oil and an inert gas or gas-forming substance are dispersed in a polymer melt, and the melt is extruded into a filament. The melt contains up to and including 1% by weight of the silicone oil, based on the weight of the melt, at the time it is extruded and up to and including 10% by weight of an inert gas.