The first thing that crosses your mind when you go face to spinneret with a spider the size of a steel-belted radial is : This is not really the way I planned to go.
42.
However, Kwolek persuaded the technician, Charles Smullen, who ran the " spinneret ", to test her solution, and was amazed to find that the fiber did not break, unlike nylon.
43.
This dispersion is then fed through a spinneret, a device used to extrude a polymer solution to form fibers, and deposited into an acidic salt solution with a pH range of 5.6 to 6.4 for coagulation.
44.
The properties of the membrane-such as average pore diameter and membrane thickness-can be finely tuned by changing the dimensions of the spinneret, temperature and composition of " dope " ( polymer ) and " bore " ( solvent ) solutions, length of air gap ( for dry-jet wet spinning ), temperature and composition of the coagulant, as well as the speed at which produced fiber is collected by a motorized spool.
