Nonwovens of synthetic continuous filaments including at least a part with modified surface properties, process for their manufacture and their applications

摘要

Nonwovens of synthetic continuous filaments obtained by melt extrusion, in which at least 50% of the filaments contain at least from 0, 5 to 3%, preferably from 0.6 to 1.5%, of a polyorganosiloxane introduced into the said filaments during their manufacture.PP Process for the manufacture of these nonwovens, in which, before extrusion of the polymer melt to produce the filaments by flowing through orifices of a die, a silicone oil of polyorganosiloxane type is introduced in the proportion at least of 0,5 to 3%, preferably from 0.6 to 1.5% relative to the polymer, into the melt of the latter.P PThe polyorganosiloxane product employed is of the polydiorganosiloxane type with a molecular weight of between 1,000 and 250,000, preferably between 7,500 and 70,000, corresponding to dynamic viscosities of 50 to 10,000 mPa s; stable under extrusion conditions. PPUse of the nonwovens, chiefly as a support for floor coverings with stitched pile.