PROCESS FOR OBTAINING STAPLE FIBRES WITH HIGH DEGREE OF CRIMPING AND HIGH WET MODULE

Inventia se refera la un procedeu pentru obtinerea celulofibrei cu modul umed ridicat si grad înalt de ondulare prin filarea vîscozei, compozitia de filare continînd modificatori cu sau fara azot, auxiliari de filare, auxiliari de întindere, compusinesubstituiti sau alchilati de ciclohexanona sau ciclopentanona si/sau compusi aminopolialchilati în cantitate de 0,2-2% la care se mai pot adauga sau nu mici cantitati de ioni de zinc si de polimeri sintetici solubili în apa, filamentele proaspat formate fiind întinse, taiate, uar fibrele rezultate fiind relaxate într-o baie alcalina la o temperatura mai mare de 40 degree C. PCT No. PCT/SE79/00235 Sec. 371 Date Jul. 14, 1980 Sec. 102(e) Date Jul. 9, 1980 PCT Filed Nov. 14, 1979 PCT Pub. No. WO80/00979 PCT Pub. Date May 15, 1980.The procedure provides for the manufacture of crimped high-wet-modulus staple fibres by spinning from viscose to which have been added small quantities of derivatives of cyclohexanone or cyclopentanone and/or alkylated amino compounds of cyclohexane or cyclopentane. To improve the tenacity of the finished fibres, combinations of nitrogen-free and nitrogen-containing modifiers can be used. The viscose and/or spinning bath can also be treated with known stretching and spinning aids. In addition, the crimp-yielding additives can be combined with small amounts of zinc ions in the viscose, and the fibres can be allowed to relax in an alkaline bath after being spun.