2004年PET和聚酰胺变形丝的产量增长25%,增加到540万t。这些数据是由比利时布鲁塞尔CIRFS估计得出的(表1)。假设聚酰胺长丝的大约45%是纺织长丝,其余为工业丝。聚酯产品中实际上全部长丝都是纺织长丝。还假设大约20%的聚酰胺长丝产量进行变形。就聚酯长丝而论,高达75%为变形丝 2004 PET and polyamide yarn production increased by 25%, increased to 5.4 million t. These data were estimated by CIRFS in Brussels, Belgium (Table 1). It is assumed that about 45% of the polyamide filaments are textile filaments and the rest are industrial yarns. In fact, all the filaments in polyester products are textile filaments. It is also assumed that about 20% of polyamide filament production is deformed. In the case of polyester filaments, up to 75% is textured yarn