PROCESS FOR THE MELT SPINNING OF POLYESTER MICROFILAMENTS WITH A DTY TIIRE OF NOT MORE THAN 0 .7 DTEX AND POLYESTER MICROFILAMENTS MANUFACTURED BY THE SAID METHOD

摘要

Process for the melt spinning of polyester microfilaments with a DTY titre of not more than 0.7 dtex, characterised in that the microfilaments are spun from the melt of a polyester with reduced relative solution viscosity compared with polyester fibre spinning grades with relative solution viscosities of between 1.60 and 1.65 as a function of their titre, wherein the polyester melt is polyethylene terephthalate and the spinning speed is 2500 m/min ± 10%. The polyester microfilament manufactured by the process have a dyeing uniformity value according to grey scale from 4.0 to 5.0 and a delta E value of less than 1.0.