Wet-spinning Processes for Starch

Previous attempts to produce starch fibers relate principally to wetspinning processes. For example, a starch/solvent colloidal suspension can be extruded from a spinneret into a coagulating bath. This process relies on the marked tendency of amylose to align and form strongly associated aggregates to provide strength and integrity to the final fiber (1). 

Any amylopectin present is tolerated as an impurity that adversely affects the fiber spinning process and the strength of the final product. Since natural starch is rich in amylopectin, pre-treating of natural starch is done to obtain the amylose-rich portion which is highly desirable for fiber spinning (1). 

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