The influence of the main technical parameters of producing polyestercotton duvetyn yarn by rotor spinning on the quality of yarn formation was analyzed,pointing out what to be paid attention during the process of spinning and manufacturing,deciding on the proper technical parameter for producing OET/C58 tex polyester-cotton duvetyn yarn.

The influences of copolymer composition on the adhesion of polyacrylic sizes to polyester/cotton yarn are investigated by an impregnated roving method for warp sizing.

The replacement of PVA by the "Green" E20 in sizing T/C yarn has obtained better effection, and the first-hand datas through the sizing experiments with three different sizing prescription are also gained,which is a technique reserve for expanding the export of china's textiles and garment after enterring WTO.