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US 11,898,272 B2Granted
Cellulose filament process
AssigneeLenzing Aktiengesellschaft
InventorsChristoph Schrempf, Johann Pillichshammer, Andreas Gressenbauer, Ernst Reiter, Martin Neunteufel
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Abstract
The present invention provides a process for the viable production of lyocell cellulose continuous filament yarns at very high production speeds.
Claims10
A process for the production of lyocell type cellulose filament yarns from a lyocell spinning solution of cellulose in an aqueous tertiary amine oxide comprising the following steps, wherein the process conditions are adjusted so that relation (1a) is fulfilled:
- L
- >
- v
- 1000
- ×
- 1.7
-
- /
-
- titer
- ×
- p
- (
- 1
-
- a
- )
- wherein L designates the length of the air gap (mm), v designates the production speed m/min), titer designates the titer of the individual filament (dtex) and p designates the length of the individual spinneret piece (mm) employed in the spinneret, and wherein v is 400 m/min or more.
15 more elements
Dependencies are inferred from the claim text.