Polysulfone Granules from Japan
Polysulfone (PSU) thermoplastic resin in granule primary form, a polymer specified in heading 3911 note 3 with monomer units exceeding 95% by weight. Falls under 3911.90.91.10 as other thermoplastic not elsewhere specified, valued for heat resistance in medical and filtration applications.
Duty Rate — Japan → United States
6.5%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Submit FTIR spectroscopy or GPC analysis confirming polysulfone monomer dominance to comply with polymer classification rules
• Label shipments clearly as 'primary form granules' to distinguish from compounded or finished products under 3920