08 Jan Question and Answer 139 ULTEM™ RESIN 2024年2月10日 By [email protected] 139 ULTEM™ RESINGrades Available: 139Available in: Europe, Asia, Americas GENERAL INFORMATIONDESCRIPTIONThe ULTEM™ resin family of amorphous thermoplastic polyetherimide (PEI) materials