Patent · US Expired

Filaments and fibers having discontinuous cavities

US4380594A · kind A · utility

8Cited by

4References

5Claims

0Family size

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	Oct 14, 1980
Grant date	Apr 19, 1983
Priority date	—
Expiry date	Oct 14, 2000

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2975
WIPO fieldTextile and paper machines
WIPO sectorMechanical 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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.