Preadhered melt spun spin-drawn polyester filaments

A process for preadhering melt-spun, spin-drawn polyester filament which improves the adhesive properties of the filament towards rubber, said process comprises the steps of:

• (a) spin-drawing polyester filaments to an up-take speed between about 2,000 to about 6,000 meters per minute using an integrated spin-drawing process;
• and
• (b) immediately after spin-drawing, applying to the polyester filament, a composition comprising simultaneously about 0.05 to about 0.5% by weight of a polyepoxide and about 5 to about 140 ppm of a tertiary amine with linear functional groups, wherein said tertiary amine has the following general formula:
• ##STR5## where R is --(CH.sub.2).sub.n --or --C.sub.6 H.sub.5 --, and "n" is 1.ltoreq.n.ltoreq.6;
• where R(1) and R(2) are identical or different and are each selected from the group consisting of:
• alkyl groups having C.sub.1-6, hydroxalkyl groups having C.sub.1-6, alkyl aryl groups or aryl groups;
• and
• wherein X is H, OH, NH.sub.2, NHR(3), NR(4), R(5), or (R6), where R(3), R(4), R(5) and R(6) are each selected from the group consisting of alkyl groups having C.sub.1-6 or aryl groups, to produce a polyester filament having a minimum adherence towards rubber in the Strip-test ranging from between about 16.0 to about 21.5daN.