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问:该项目的实施背景是怎样的?答:我国从20世纪70年代开始大规模引进聚酯纤维生产设备技术,目前聚酯PET产量已占到世界总产量的60%左右。在聚酯PET的众多用途中,涤纶工业丝属于技术门槛较高的品种。PET产品力学性能越高,要求其分子量越大,对应的熔体动力黏度就越高。常规的熔融缩聚只能将PET特性黏度提升至0.65dl/g左右,可用于纺制民用涤纶纤维;而以往制备聚酯瓶片和涤纶工业丝所需的聚酯原料必须后加固相缩聚才能获得。在该项目研发成功以前,全球涤纶工业丝生产长期采
Q: What is the background of this project? A: Since the 1970s, China began to introduce polyester fiber production equipment on a large scale. At present, PET PET production accounts for about 60% of the world’s total output. Polyester PET in many uses, polyester industrial yarn belongs to the higher technical threshold varieties. PET products, the higher the mechanical properties, the greater the required molecular weight, the higher the corresponding melt viscosity. Conventional melt polycondensation PET intrinsic viscosity can only be increased to about 0.65dl / g, can be used for spinning civil polyester fiber; polyester polyester chips and the polyester raw materials needed in the past polyester raw materials must be added to the solid phase polycondensation obtain. Before the successful development of the project, the global polyester industrial yarn production has been adopted for a long time