Carstabil 90 PE Polymer from Japan
Carstabil 90 PE Polymer is a thermoplastic primary form resin under HTS 3911.90.15.00, matching the exact chemical description of the aromatic carbodiimide homopolymer with polyethylene. Functions as anti-hydrolysis agent in PET bottle preforms and film extrusion, extending service life in humid environments. Polymer classification confirmed by >95% named monomer content per subheading rules.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Request pre-shipment CBP classification binding ruling with full chemical structure and NMR analysis
• Ensure bill of lading describes as 'primary polymer forms, not articles' explicitly
• Pitfall: heat history documentation needed to prove non-chemically modified status per note (a)(3)