Polybutylene Terephthalate (PBT) Resin from Canada
Polybutylene terephthalate (PBT) is a thermoplastic polyester resin in primary pellet form used for injection molding in automotive and electrical components. It falls under HTS 3907.99.5050 as 'other polyesters, other' because PBT is a polyester where terephthalic acid and butanediol monomers predominate by weight, not specifically named elsewhere in the heading.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Obtain detailed monomer composition certificates to confirm predominant monomer for polyester classification under subheading notes
• Ensure primary form (pellets/resin) documentation; finished articles shift to Chapter 39 headings like 3926
• Verify no chemical modification exceeding base polymer to avoid 'Other' subheading misclassification