D - Textiles – Paper – 01 – D
Patent
D - Textiles, Paper
01
D
D01D 5/098 (2006.01) D01F 2/00 (2006.01)
Patent
CA 2432790
The invention relates to a method and a device for producing substantially endless fine threads from polymer solutions, especially spinning material for lyocell, wherein the spinning material is spun from at least one spinning hole or a spinning slot. The spun thread or film is drawn by high-speed accelerated gas flows using a Laval nozzle whose narrowest cross-section is located beneath the point where the spinning material exits. The threads are arranged on a strip in the form of a non-woven or are taken up in the form of a yarn and are subsequently separated in spinning baths by means of solvents
L'invention concerne des procédés et des dispositifs pour la production de filaments fins sensiblement continus à partir de solutions de polymères, en particulier de matières à filer pour lyocell. Selon l'invention, la matière à filer est filée à partir d'au moins d'un alésage de filage ou d'une fente de filage et le filament ou le film ainsi obtenu est étiré par des courants gazeux accélérés jusqu'à une vitesse élevée au moyen d'une tuyère de Laval dont la section la plus étroite se trouve en-dessous de la sortie de la matière à filer. Les filaments sont déposés sous forme de nappe sur une bande ou attrapés pour former un fil, puis séparés de leurs solvants dans des bains de précipitation.
Gerking Luder
Mcfadden Fincham
LandOfFree
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