High speed spun filament yarns based on polycaprolactam and...

D - Textiles – Paper – 01 – F

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D01F 6/60 (2006.01) C08G 69/16 (2006.01) D01D 5/08 (2006.01)

Patent

CA 2137375

Filaments with a relative viscosity RV of 2.0 to 3.0 (measured at a concentration of 1 g of fibres per 100 ml in a 96 wt % sulphuric acid, based on polycaprolactam, obtainable by:(a) extruding a melt consisting essentially of caprolactam through a spinning nozzle to form caprolactam filaments;(b) cooling the filaments thus produced and (c) drawing the cooled filaments off at a rate of at least [3600 + 1250.(3.0-RV)]m/min, the polycaprolactam used being produced in the presence of at least one bicarboxylic acid from the group: C4-C10-alkane bicarboxylic acids, C5-C8- cycloalkane bicarboxylic acids, benzole and naphthaline bicarboxylic acids which may have up to two sulphonic acid groups and whose carboxylic acid groups are not adjacent, N-C1-C6-alkyl-N,N-di(C4-C10-alkane carboxylic acid)amine, 1,4-piperazine-di(C1- C10-alkane carboxylic acid), and a process for producing these filaments, their use for the production of fibers and flat products, and fibers and flat products made of these filaments.

Fils de viscosité relative RV de 2,0 à 3,0 (mesurée à une concentration de 1 g de fils pour 100 ml dans l'acide sulfurique à 96 % en poids), à base de caprolactame, que l'on obtient a) en extrudant, dans une filière, une masse fondue, essentiellement constituée de polycaprolactame, de manière à former des filaments de polycaprolactame, b) en refroidissant les filaments ainsi produits, et c) en étirant les filaments refroidis, à une vitesse d'au moins ¢3600 + 1250.(3,0 - RV)! m/min, le polycaprolactame utilisé étant produit en présence d'au moins un acide dicarboxylique choisi dans le groupe comprenant les acides alcane-dicarboxyliques en C4-C10, les acides cycloalcane-dicarboxyliques en C5-C8, les acides benzène- et naphtalène-dicarboxyliques pouvant contenir jusqu'à deux groupes acide sulfonique, et dont les groupes acide carboxylique ne sont pas voisins, le N-C1-C6-alkyl-N,N-di(acide alcane-carboxylique en C4-C10)amine, le 1,4-pipérazine-di(acide alcane-carboxylique en C1-C10), ainsi qu'un procédé de production de ces fils, leur utilisation dans la fabrication de fibres et de produits fibreux plats, ainsi que les fibres et les produits fibreux plats obtenus à partir de ces fils.

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