| abstract |
Apparatus for drying polyester particles comprising the first zone of heating and crystallizing non-crystalline polyester particles which are packed in such a manner that they are movable downwards by their own weight, at temperatures ranging 120*-200* C., with mechanical agitation, until at least the surfaces of the particles are substantially crystallized, and the immediately succeeding zone of heating and drying the particles maintained under the packed state but without agitation, each zone having a separate hot air inlet with a common outlet therebetween. |