| 摘要 |
<p>The object of the invention is the pretreatment method of poliester for reducing elimination of oligomers at high-temperature acid colouring with dispersion dyes and the composition of the pretreatment bath for polyester, which is to be coloured according to the conventional acid procedure in the high-temperature devices. The method is based on 15 to 30 minutes treatment of polyester in basic bath at 130°C and triple washing in hot soft water before the conventional acid colouring of polyester at temperatures from 130 to 135°C. The basic bath consists of the appropriate amount of basics or corresponding puffer mixtures.</p> |
