Polysulfone Granules from Canada
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 — Canada → United States
16.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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