Patent · US Expired

Continuous process for the production of filaments or fibers from difficultly soluble synthetic polymers

US4427613A · kind A · utility

0Cited by

9References

6Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Ulrich Reinehr · Dormagen, DE
Joachim Dross · Dormagen, DE
Toni Herbertz · Dormagen, DE
Hermann-Josef Jungverdorben · Dormagen, DE
Hans K. Burghartz · Neuss, DE

Key dates

Filing date	Jul 2, 1981
Grant date	Jan 24, 1984
Priority date	—
Expiry date	Jul 2, 2001

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD01D1/02
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a process for the continuous production of synthetic non-discolored filaments and fibers from a filament forming synthetic polymer being difficultly soluble in an organic polar solvent particularly polyacrylonitrile polymers which process comprises preparing a suspension of said polymer and said solvent at room temperature and subsequently heating the suspension thus formed for at least 3 minutes to at least 130.degree. C., and filtering the clear spinning solution formed without intermediate cooling, homogenizing and spinning it immediately afterwards into filaments.

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