IFJ_032022_performancefibers_top002 Ken Norberg June 10, 2022 515 Views Zylon PBO is a rigid-rod isotropic crystal polymer that is spun by a dry-jet wet-spinning process. Photo courtesy of Toyobo Zylon PBO is a rigid-rod isotropic crystal polymer that is spun by a dry-jet wet-spinning process. Photo courtesy of Toyobo