Production Of UHMWPE Fiber

UHMWPE fiber is a new material, its application field is very wide, from aerospace to national defense military, and then to civilian rope mesh, has its broad application market and development field. However, due to the characteristics of this fiber and the characteristics of ultra-high molecular weight, it is very different from the production of conventional chemical fiber. The total overstretch of conventional chemical fiber [staple fiber] is generally: several times -20 times can be, and the total overstretch of this gel fiber is more than 100 times, why do you want to stretch so many times? This is due to the presence of solvent, so that the number of chain entanglements in the fiber is reduced. In other words, this kind of fiber, it takes a long process from spinning spinneret to product molding to achieve, the process is long, there are more links, and the control is naturally more difficult. It is like a chain, no matter which link is missing, the whole chain will break.
In each process of production, it is necessary to strictly control the external technical indicators of the fiber, but also to master and understand the changes in the internal molecular structure of the fiber, to see whether the changes in its internal structure meet the process requirements that it can achieve in this section. In other words: in each production process of the fiber, its internal and external technical indicators change is not the state that people want to achieve. Therefore, in the production process, the physical inspection and testing of semi-finished products are indispensable means of intermediate control.
It is not easy to produce qualified products and achieve a certain production rate. At present, the degree of theoretical cognition in this field needs to be further studied and improved, especially the mature large-scale industrialization production technology is not very mature. The situation is different, the general analysis: there are technical problems, there are equipment problems, and some control methods. Of course, personnel and funding problems cannot be ruled out.
The production of UHMWPE fiber is high-tech, and the control of every link in the production process is very rigorous and the control precision is very high. In some sections, the temperature difference is 1 degree, and the linear speed difference is 0.1 m/min, which will produce a large number of hairs and broken heads, resulting in the phenomenon of winding rolls, and the production of conventional chemical fibers does not need to be so strict.