Lyocell Method and Device Involving the Control of the Metal Ion Content
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United States of America Patent
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Issued Date -
Sep 13, 2007
app pub date -
Mar 1, 2005
filing date -
May 13, 2004
priority date (Note) -
Abandoned
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Abstract
The invention relates to a method and a device for producing Lyocell fibers, which are extruded from a spinning mass containing water, cellulose and tertiary amine oxide. The spinning mass is obtained from cellulose in a number of process steps, wherein a treatment medium is added to the cellulose, cellulose suspension and/or cellulose solution. In order to be able to implement a stable and environmentally compatible spinning method irrespective of the type of cellulose used, according to the invention, provision is made that the content of at least one type of metal ion destabilising the cellulose suspension and/or cellulose solution is monitored in the cellulose, cellulose suspension and/or cellulose solution and adjusted below a stability limit. With the device according to the invention, the metal ion content is measured via sensors (23, 23') and the metal ion content is adjusted using a control device (17).
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