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聚酯纤维已成为我国化纤第一大类化纤产品,熔体直纺技术已经成为了国际最先进的主导工艺。熔体直纺工艺具有产能大、能耗低、效率高、成本低的特点,但流程长、聚合与纺丝条件相互影响、工艺调节影响面广,品质控制难、产品开发难度大、差别化率低。倡导大容量聚酯纤维高品质化、差别化、功能化、柔性化,并高度融合,其中关键核心工程科学问题为纺丝仿真模型。本文在介绍熔融纺丝仿真模型研究概况基础上,对仿真模型的构建从材料参量仿真、流场仿真、成型过程仿真、结构与性能关系方面进行较为详细的说明。在熔融纺丝仿真模型的应用方面,主要介绍了超细旦纤维的开发、改性共聚酯纤维的制备及异形纤维成型几个方面。最后对未来聚酯纤维的发展进行了展望,指出未来将继续坚持数字化仿真与纺丝技术的高度融合,建立数字化研究平台与纺丝技术数字化平台,基于唯象工程模型、性能预测模型等,结合实际生产过程,实现全流程数字化控制。
Polyester fiber has become the first category of chemical fiber products in China, melt spinning technology has become the most advanced international technology. Melt direct spinning process has the characteristics of large capacity, low energy consumption, high efficiency and low cost, but the process is long, polymerization and spinning conditions affect each other, the impact of process regulation is broad, quality control is difficult, product development is difficult, differential Low rate. Advocate the high-quality large-capacity polyester fiber, differential, functional, flexible, and a high degree of integration, of which the key core scientific problems for the spinning simulation model. In this paper, based on the introduction of the research overview of melt spinning simulation model, the construction of simulation model is described in detail from the aspects of material parameter simulation, flow field simulation, molding process simulation, structure and performance. In the application of the simulation model of melt spinning, the development of ultrafine fibers, the preparation of modified copolyester fibers and the forming of shaped fibers are introduced. Finally, the future development of polyester fiber is prospected. It is pointed out that the future will continue to adhere to the high degree of integration between digital simulation and spinning technology, establish a digital research platform and a digital platform for spinning technology, based on the phenomenological engineering model and performance prediction model, etc. The actual production process, to achieve the whole process of digital control.