Patent · US Active

Process to manufacture a spun-dyed para-aramid filament yarn and sliver

US9863066B2 · kind B2 · utility

0Cited by

4References

5Claims

0Family size

Assignee

TEIJIN ARAMID GMBH · DE

Inventors

Robin Winters · Bemmel, NL
Regine Maria Zumloh-Nebe · Wuppertal, DE
Christian Norhausen · Leverkusen, DE

Key dates

Filing date	Nov 18, 2014
Grant date	Jan 9, 2018
Priority date	—
Expiry date	Nov 18, 2034

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD10B2331/021
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Manufacturing a spun-dyed para-aramid filament yarn includes (a) preparing a spin dope comprising a para-aramid polymer, at least one dyestuff and concentrated sulfuric acid, (b) spinning the spin dope through a spinneret to obtain spun filaments, (c) coagulating the spun filaments to obtain coagulated filaments, (d) neutralizing the coagulated filaments to obtain neutralized filaments, (e) washing the neutralized filaments to obtain washed filaments, and (f) drying the washed filaments to obtain dried filaments. In step a) the spin dope includes 17.5 to 18.5% by weight of a para-aramid polymer with respect to the weight of the spin dope, and 4 to 15% by weight of the at least one dyestuff with respect to the weight of the para-aramid polymer plus the at least one dyestuff. In step f) the filaments are hold under a tension in a range from 0.2 to 0.8 cN/dtex.

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