聚酯纤维是指由多种二元醇和芳香族二元羧酸或其酯经缩聚生成的聚酯为原料所制得纤维的统称。具体品种有:聚对苯二甲酸乙二酯纤维，聚对苯二甲酸丁二酯纤维，聚对苯二甲酸丙二酯纤维，聚对苯二甲酸-1,4-环己二甲酯纤维，聚-2,6-萘二酸乙二酯纤维，以及多种改性的聚酯基纤维，如:
Polyester fiber refers to a general designation of fibers made from polyester which is polycondensated from a variety of diols and aromatic dicarboxylic acids or their esters. The specific varieties are: polyethylene terephthalate fiber, polybutylene terephthalate fiber, polytrimethylene terephthalate fiber, polytrimethylene terephthalate-1,4-cyclohexanedimethylene fiber, poly2,6-naphthalene diacid fiber, and a variety of modified polyester based fibers, such as:
1.阳离子可染聚酯纤维，cationic dyed polyester，简称CDP;
1. Cationic dyed polyester, CDP for short;
2.阳离子染料可常压沸染的聚酯纤维，easycationicdyeablepolyester，简称ECDP
2. Polyester fiber with cationic dyestuff and boiling dyeing at atmospheric pressure
3.分散染料常压可染共聚醚酯，Easy DispersedDyeability Polyester简称EDDP
3. Disperse dyestuff can dye copolyether ester at atmospheric pressure, easy dispersed dyeability polyester is short for EDDP
4.易水解聚酯
4. Hydrolyzable polyester