Patent · US Expired

Process for the production of uniform POY filaments

US4940559A · kind A · utility

12Cited by

4References

7Claims

0Family size

Assignee

Davy McKee Aktiengesellschaft · DE

Inventors

Bernd Kretschmann · Kronberg, DE
Dietmar Wandel · Hanau, DE

Key dates

Filing date	Dec 9, 1988
Grant date	Jul 10, 1990
Priority date	—
Expiry date	Dec 9, 2008

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD01F6/62
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Melt spinning method for the production of pre-oriented low-crystalline synthetic filaments which are distinguished by a high degree of uniformity and by the ability of being worked at high speeds in a friction-draw texturing process, according to which method the damping ratio of the spinning filament between the point of solidification and the winding unit, defined as the ratio of the fluctuation range of the filament tension at the beginning and at the end of the above-defined filament path is <0.10, and a driven roller with a freely rotating additional small roller in multiple wrap-around contact is utilized as the draw-off roller system.

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