Polyphenylene Ether Resin from Mexico
Polyphenylene ether (PPE) resin is a high-performance engineering thermoplastic in primary pellet form, classified under HTS 3907.29.00.00 as 'other polyethers' because it consists of repeating ether linkages from its monomer units exceeding 95% by weight. It is used in automotive parts and electronics for its heat resistance.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify polymer composition via certificate of analysis to confirm >95% ether monomer content for 3907 classification
• Ensure primary form (pellets/granules) documentation; finished articles shift to Chapter 39 headings like 3920
• Avoid misclassification as polyester by checking ether vs ester linkages in technical data sheets