Melt blowing is the major process for making nonwoven products. We have developed a lab scale melt blowing line for preparing filter media with new polymers. We have used it to demonstrate surface modification of polybutylene terephthalate fibers by hydrolysis and fluorination. Nanofiber mats have been prepared by melt blowing blends of immiscible polymers followed by removal of a water soluble matrix. Tan, D. H.; Zhou, C.; Ellison, C. J.; Kumar, S.; Macosko, C. W.; Bates, F. S., Meltblown Fibers: Influence of Viscosity and Elasticity on Diameter Distribution. J. Non-Newtonian Fluid Mech. 2010, 165, 892-900. Wang, Z.; Macosko, C. W.; Bates, F. S., Tuning Surface Properties of Poly(butylene terephthalate) Melt Blown Fibers by Alkaline Hydrolysis and Fluorination. ACS Appl. Mater. Interfaces 2014, 6, 11640-11648. Zuo, F.; Tan, D. H.; Wang, Z.; Jeung, S.; Macosko, C. W.; Bates, F. S., Nanofibers from Melt Blown Fiber-in-Fiber Polymer Blends. ACS Macro Lett. 2013, 2, 301-305.