Process and apparatus for the manufacture of linear high molecular weight polyesters

摘要: A process for the manufacture of high molecular weight linear polyesters which are derived from dicarboxylic acids or their ester-forming derivatives and diols, by condensing polyester precondensates, having a relative viscosity at least 1.05, 270° to 340° C. under reduced pressure, condensation being started 290° temperature lowered as progresses, final 10° above melting point particular produced, an apparatus carrying out process.