Patent · US Expired

Cellulose extrusion

US7037096B1 · kind B1 · utility

0Cited by

6References

2Claims

0Family size

Assignee

Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

Stefan Beckers · Peine, DE
Peter Weigel · Borchen, DE
Hans-Peter Fink · Teltow, DE
Michael Dosz · Berlin, DE
Hans-Joachim Purz · Teltow, DE

Key dates

Filing date	Oct 18, 1999
Grant date	May 2, 2006
Priority date	—
Expiry date	Oct 18, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2301/02
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Apparatus for the production of extruded blown cellulose film from a solution of cellulose, water and an amine-oxide, which includes:—extrusion apparatus for continuously extruding a cellulose solution to produce a cellulose film;—solidifying apparatus for solidifying the extruded cellulose film;—drawing apparatus positioned downstream of the extrusion apparatus for continuously drawing the extruded cellulose film from the extrusion apparatus; and a tubular member for containing precipitation apparatus and for receiving an extruded blown film wherein the tubular member is situated within a precipitation bath. The invention also includes a method of extruding blown film.

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