FIELD: technological processes.
SUBSTANCE: invention is related to polyester composition for production of stocks for bottlers and bottles for drinks, production of polyester composition and stock from it. Polyester composition contains polyester polymer, which represents homopolymer of polyethylene terephthalate (PET) or its copolymer, and up to 5 mole % of cyclohexane dimethanol, up to 5 mole % of diethylene glycol, up to approximately 5 mole % of isophthalic acid or aliphatic dicarboxylic acids and diols having from 3 to 8 carbon atoms, and activated coal for increase of repeated heating speed with particle size d50 of more than 2 mcm. Polyester composition is produced by addition of activates coal to melted phase of polyester polymer in the form of granules in hard state or in casting machine for production of stocks. Concentrated polyester composition that comprises activated coal may be added to main polyesters to produce stocks suitable for blowing into bottles.
EFFECT: produced composition results in improved speed of repeated PET heating.
47 cl, 3 ex, 3 tbl, 4 dwg
