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Patent
Title
Verfahren zur Herstellung von Vliesstoffen, Vliesstoffe und deren Verwendung
Other Title
Production of nonwovens, from cellulose carbamate and regenerated cellulose, produces continuous filaments at a spinneret to pass through a precipitation bath and be eddied before laying on a continuous conveyor.
Abstract
Die Erfindung betrifft ein Verfahren zur Herstellung von Vliesstoffen, bei dem eine lyotrope Loesung von Cellulosecarbamat in N-Methylmorpholin-N-Oxid (NMMNO) mittels Extrusion durch einen mehrere Oeffnungen enthaltenden Duesenbalken ueber einen Luftspalt in ein Faellbad zu mehreren Endlosfaeden versponnen wird, die im Anschluss durch Anstroemen mit gasfoermigem Medium und/oder Fluid verwirbelt werden. Ebenso betrifft die Erfindung derartige Vliesstoffe sowie deren Verwendung.
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WO2005080661 A UPAB: 20051019 NOVELTY - For the production of nonwovens, a lyotropic solution (1) of cellulose carbamate in N-methylmorpholine-N-oxide (NMMNO) is spun into continuous filaments through a spinneret (3) with at least 20 or at least 1000 openings. The filaments pass through an air gap into a precipitation bath (4), and finally eddied by a gas and/or fluid medium through a jet (7). The eddied filaments are laid on a continuous conveyor (8) to pass under a washing jet (9). USE - The nonwoven is for use as a disposable material in medicine as operating theater covers, bed sheets, wound dressings, gauze or wadding. It can be used in hygiene articles, and as household wipes. Other applications include tablecloths, serviettes, curtains, as an interlay in apparel, reinforcement or insulation in the construction industry, and a fiber reinforcement for thermoplastic and heat-setting plastics materials. ADVANTAGE - The nonwoven from cellulose carbamate and regenerated cellulose gives good product characteristics with low capital and operating costs, and with little or no impact on the environment.
Inventor(s)
Weigel, P.
Fink, H.
Patent Number
102004007617
Publication Date
2007
Language
German