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Title
Verfahren zur Herstellung von Celluloseformkoerpern und die mit diesem Verfahren hergestellten Formkoerper sowie deren Verwendung
Date Issued
2000
Author(s)
Weigel, P.
Fink, H.P.
Frigge, K.
Patent No
1996-19633405
Abstract
A method for the preparation of cellulose articles by precipitating cellulose in a bath filled with a solution containing cellulose dissolved in an amine oxide/water system uses a cellulose solution containing cellulose fibres. Cellulose articles comprising composite materials of cellulose fibres embedded in a cellulose fibre matrix are also claimed. Preferably cellulose fibre content is 5-90 (20-60) %. Water content and/or the solution temperature in the bath are chosen to ensure that the fibre surfaces become swollen and/or partially dissolved. The mixture of cellulose fibres and cellulose solution is obtained by ensuring that not all of the cellulose fibres dissolve during the preparation of the cellulose solution. Chemical pulp, regenerated cellulose or natural fibres (eg. flax, hemp, jute, raffia, sisal, ramie or manila), or alternatively bacteria cellulose, are used. A tubular film is prepared by extruding the mixture through a circular nozzle. The E-modulus of the articles is 12 00-15000 MPa. USE - The articles are used as food packaging materials, especially sausage skins (claimed). ADVANTAGE - The highly oriented cellulose fibres in the uniaxially or biaxially oriented cellulose matrix increase the strength of the articles and provide anisotropic mechanical properties.
Language
de
Patenprio
DE 1996-19633405 A: 19960819