Polypropylene Microporous Separator Film from Japan
A microporous polypropylene sheet used as battery separators, featuring interconnected pores for electrolyte flow. Classified in HTS 3921.19.0010 due to its cellular microporous structure of polypropylene film, meeting the 'other plastics' cellular category.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Include technical data sheets proving Gurley air permeability <500 sec/100cc and porosity 30-50% for proper 3921.19.0010 classification
• Ensure COO certification; many origins qualify for Free (AU,CA) but confirm via HTS special column