treated at 240 u00b0 c which corresponds to a contact time of about 5 seconds this was followed by spin finishing and the folded yam was wound up at 120 m min the yam had a linear density of 795 dtex a tenacity of 0 86 cn dtex and an elongation at break of 661 the as spun filament linear density asfld was 2 7 dtex the examination under the microscope reveals a ribbony filament cross section featuring round individual filaments the ribbon width is 1310 micron so the ribbon width is a bout 38 larger than that of example 2 of table 1 where a similar linear density was spun from a 96 hole jet the yam surface is smooth and almost groove and flute free the only weakly expressed longitudinal flutes extend parallel to the fibre axis the elastane yarn has a distinctly higher lustre level compared with the elastane yarn of example 2 the lustre number is 230 table 1 summarizes further examples of wet spun elastane yarn having a linear density of 800 dtex which was produced according to example 1 except that different hole numbers and a coagulation bath speed of 60 m min were used as is discernible from table 1 the ribbon width increases considerably with a finer as spun filament linear density cf examples 3 5 a portion of the spinning solution was spun from 172 hole and 385 hole jets as described in example 1 the only difference was an additional squeeze roller which rests on the diverting roller in the coagulation bath the contact pressure of the squeeze roller pneumatically controlled.