Quote Originally Posted by Mjolinor View Post
Would it not do a better job of aligning the molecules if you used a bigger nozzle and moved fast to stretch the extrusion?
Nope.

You need to force the polymer through a constriction for that to happen. That's why the ideal thickness for a living hinge is no more than about .020" in molding. The very act of injecting it through the thin section of the mold is what straightens the polymers.