What are the main factors affecting melt spinning?

First, if the viscosity flow temperature is too high, such as polypropylene clear, the processing is not cost-effective, and polyacrylonitrile is a polar polymer, even if the melt viscosity is very large, which is not conducive to processing. Second, if the decomposition temperature of polyvinyl alcohol is lower than the viscosity flow temperature, it can not be melt spun as long as these are not in conflict

For solution spinning, one is to find a suitable solvent. Generally speaking, nonpolar crystalline polymers are not suitable for solution spinning, because their melting needs to be heated to the melting point. It is difficult to find such a high boiling point solvent and the solubility parameters are close to each other, so it is possible to find suitable solvent for solution spinning