Maleated Natural Rubber (MNR) from Japan
MNR features maleic anhydride grafted onto natural rubber backbone for better adhesion in rubber composites. Supplied as primary crumb or powder. Grafting qualifies it as chemical derivative under HTS 3913.90.1000.
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
• Include grafting degree (% maleic anhydride) analysis to prove chemical modification
• Distinguish from physical blends (which stay 4002) via solubility tests or spectroscopy
• Mark containers 'primary polymer form - not for direct use' to prevent article misclassification