The melt direct spinning for the biggest kind of synthetic fiber-polyester fiber

has been the most advanced and leading technology due to the advantage of high productivity

low energy

high efficiency

and low costing. However

it also exists problems of the long process

mutual effect between polymerization and spinning conditions

widely influence of the process adjustment

hardness of the quality control

difficulty of the new product development

and the low ratio of differentiation. It needs to advocate the large capacity of polyester fibers to be high quality

differential

functional

flexibility

and their combination

while the key engineering scientific problems is spinning simulation model. Based on the research of the melt spinning simulation model

this article shows the details of how to build a spinning simulation model from the material parameter simulation

flow field simulation

process simulation

and relationship of the fiber structure and property. The applications of the melt spinning simulation model which mainly introduces the development of superfine fiber

the preparation of modified co-polyester fibers

and the forming of shape fibers. Finally

the development of polyester fibers in the future is prospected. It is pointed that high combination of digital simulation and the spinning technology should be persisted in future; the digital platform of research and spinning technology should be established; combination with practical process

full digital control process basing on the phenomenological engineering model and properties prediction model etc

should be fulfilled.