Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Peter Weigel

Hans-Peter Fink

Konrad Frigge

Stefan Dominic Beckers

Ulrich Wigand Wachsmann

Wolfgang Schwarz

Wolfgang Wagenknecht

Helmut Remde

Harry Schleicher

Michael Doss

Roger Henri Hendrikx

Hans-Joachim Purz

Michael Dosz

Hans-Peters Fink

Ernst Walenta

Jurgen Gensrich

Albrecht Bauer

Hendrik Wetzel

Martin Nywalt

Hans Joachim Purz

Apparatus for the production of extruded blown cellulose film from a solution of cellulose, water and an amine-oxide, which includes:&#x2014;extrusion apparatus for continuously extruding a cellulose solution to produce a cellulose film;&#x2014;solidifying apparatus for solidifying the extruded cellulose film;&#x2014;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.

Cellulose extrusion

The invention relates to a method of manufacturing tubular films from a solution of a mixture if cellulose and proteins by extrusion blowing the solution over an air gap into a precipitation bath, and to the films produced with this method and their application.

Tubular films formed from cellulose/protein blends

Process for the production of cellulose shaped bodies through the precipitation of a cellulose solution containing cellulose dissolved in an amine oxide/water system in a precipitation bath, wherein the solution contains additional cellulose fibers.

Process for the production of cellulose shaped bodies, bodies produced by this process and the use thereof

Method of making blown films of cellulose

Process for producing cellulose fibres

Cellulosic molding process and cellulosic moldings

The invention relates to a method of manufacturing cellulose solutions whereby cellulose is dispersed in an aqueous amino oxide solution and is treated with xylanase or enzyme mixtures containing xylanase.

Method of manufacturing cellulose solutions in aqueous amino oxide

This invention relates to flexible cellulose fibers with a reduced modulus and a decreased NMR degree of order, particularly for use in the textile field, which are obtained by pressing out solutions of the cellulose in hydrous NMMNO through spinning nozzles along an air travel into an NMMNO-containing aqueous and/or alcoholic precipitation bath as well as by a conventional rinsing, aftertreatment and drying, with strengths of between 15 and 50 cN/tex, and to a process for their production. According to the invention, these flexible cellulose fibers have an initial modulus of less than 1,500 cN/tex, and the relationship of the heights of the lines at 88 ppm and 85 ppm above the spectrum base line in the highly resolved .sup.13 C-NMR solid-body spectrum is .ltoreq.1. Furthermore, these flexible cellulose fibers are obtained by means of a process in which specified hydrophilic, low-molecular weight, organic additives, which are soluble in the polymer solution and have mainly nitrogen-containing groupings are added in defined amounts to the spinning solution of the cellulose as well as to the precipitation bath.

Process of making flexible cellulose fibers

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Kleinmachnow, Germany

Peter Weigel