Patent · US Expired

Process for spinning hydrophilic acrylic fibers with improved coloring response to dyes

US4185058A · kind A · utility

2Cited by

1References

9Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Ulrich Reinehr · Dormagen, DE
Toni Herbertz · Dormagen, DE
Hermann-Josef Jungverdorben · Dormagen, DE

Key dates

Filing date	Feb 13, 1978
Grant date	Jan 22, 1980
Priority date	—
Expiry date	Feb 13, 1998

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD01F6/18
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The invention relates to hydrophilic fibers and filaments with good coloring response to dyes from filament-forming hydrophobic synthetic polymers having a sheath-core structure with a highly microporous core and a substantially compact sheath and having a water retention capacity of at least 10% wherein the pores in the core have an average pore diameter measured in the direction of the cross-section of the fiber, of at most 4000 A. The invention relates also to a process for the production of those filaments and fibers according to a dry-spinning process wherein a spinning solution is spun below the boiling point of the spinning solvent used.

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