Weigel, P.P.WeigelGensrich, J.J.GensrichFrigge, K.K.FriggeWagenknecht, W.W.WagenknechtBauer, A.A.Bauer2022-03-082022-03-081998https://publica.fraunhofer.de/handle/publica/303905The invention relates to flexible cellulose fibres with a reduced modulus and a reduced degree of order of nuclear magnetic resonance spectrum, intended in particular for use in the textile industry, said fibres being obtained by extrusion from cellulose solutions in aqueous NMMO through spinning nozzles across an air section into an aqueous and/or alcohol precipitating bath containing NMMO, and by conventional rinsing, aftertreatment and drying at a closeness of 15 and 50 cN/tex, and a process for the production of said fibres. According to the invention, said flexible cellulose fibres have an initial modulus of smaller than 1500 cN/tex and the ratio of the heights of the lines at 88 ppm and 85 ppm is less than or equal 1 across the spectrum base line in the high-esolution ->13 C nuclear magnetic resonance solid-state spectrum. Moreover, these flexible cellulose are obtained by means of a process by which hydrophile, soluble (in the polymer solution), low-molecular, organic additives containing mainly groupings containing nitrogen are added in defined amounts to both the spinning dope of the cellulose and to the precipitating bath.de608668patent1994-4420304