Process for the production of polymeric yarn high tenacity and low creep, polymeric or copolu00ecmericos yarn high tenacity and low creep, and use of polymeric yarn

摘要

Process for the production of polymeric yarn high tenacity and low creep, polymeric or co polymeric yarn high tenacity and low creep, and use of polymeric yarns.The present invention relates to a process for the production of polymeric yarn high tenacity and low creep, which comprises the following steps: (a) preparing a mixture of: (I) a first polymer or copolymer poliolefinico of ultra high molecular weight, (II) a second polymer. Or a copolymer poliolefmico nanocompu00f3sito clay, (III) a solvent for spinning apolar,(b) feeding the resulting suspension in an extruder at a temperature of at least 180 u00b0 C to form a gel, (c) spinning the gel obtained in a chain with ratio of length / diameter (L / D) greater than 15, (d) subjecting the wire to a cooling to a temperature below 2 u00b0 C, (and later) Removal of the solvent spinning apolar,And (f) to stretch the wire obtained by achieving tenacity more than 18 CN / dtex and a fluence lower than 0,07% per hour, and the first polymer or copolymer poliolefinico of ultra high molecular weight has a weight average molecular weight greater than 2000.000 g / mol and a polidispersividade above 7, and the second polymer or copolymer poliolefinico nanocompu00f3sito clay is obtained by polymerization of an olefin and a III situ lamellar clay exfoliated, and polyolefin obtained has a weight average molecular weight of at least 400. 000 g / mol.