Patent · US Expired

Method for producing shaped bodies

US6881361B1 · kind B1 · utility

15Cited by

0References

14Claims

0Family size

Assignee

Ostthuringische Materialprufgesellschaft fur Textil und Kunststoffe mbH · DE

Inventors

Thomas Schulze · Rudolstadt, DE
Eberhard Taeger · Rudolstadt, DE
Dieter Vorbach · Rudolstadt, DE

Key dates

Filing date	Feb 24, 2000
Grant date	Apr 19, 2005
Priority date	—
Expiry date	Feb 24, 2020

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2325/0233
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a method for producing shaped bodies, especially threads or foils, from at least one polymer of the groups consisting of polysaccharide, polysaccharide derivative or polyvinyl alcohol by forming a solution of the polymer that contains an additive in a solvent containing amine-N-oxide, extruding the solution and precipitating the extrudate by contacting with a coagulant. The invention is characterized in that at least two polymeric solutions are formed. At least one of the two polymeric solutions contains one or more finely distributed additives and the at least two polymeric solutions are simultaneously extruded forming a combined extrudate.

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