Thermoplastic Natural Rubber (TPNR) from Mexico
TPNR dynamically vulcanizes natural rubber within thermoplastic matrix, creating processable pellets for injection molding. Primary pellet form. Blends chemically cross-linked qualify as modified natural polymer under 3913.90.1000.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Composition breakdown must show natural rubber phase >50% with documented vulcanization
• Microscopy evidence of co-continuous morphology prevents synthetic polymer misclassification
• Specify pellet size <5mm to confirm primary form vs. finished shapes