Battery Grade PP Microporous Membrane from Japan
High-purity microporous polypropylene membrane for lithium-ion battery separators with controlled pore distribution. Classified under HTS 3921.19.0010 for microporous polypropylene cellular film sheets.
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 shutdown temperature data (>130°C) proving separator functionality without changing classification
• Anti-dumping risks from Asia; verify scope exclusions for certain copolymers
• Classify as film regardless of thinness (<0.1mm); thickness doesn't affect heading