FIELD: process engineering.
SUBSTANCE: proposed method is realised at vitrification temperature. Polyester material melt is fed into cooling water flow and separated from cooling water after passing the cooling section. Note here that polyester material residence time on said cooling section varies from 0.2 to 5.0 s, while cooling water in said section features pressure of at least 2 bar (0.2 MPa). Invention covers also the application of product thus produced for immediate feed into reactor or drier of solid-phase post condensation, preferably, tower- or pit-type drier is used.
EFFECT: controlled formation of granule surface structure, ruling out sintering of granules.
15 cl, 2 dwg, 1 tbl
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