Unsaturated Polyester Electrical Insulation Board from Japan
Rigid boards of noncellular unsaturated polyester for electrical panel insulation and transformer covers. Classified HTS 3920.63.2000 as other polyester sheets. High dielectric strength.
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 dielectric strength test data for customs verification
• Classify as semi-finished, not electrical apparatus parts
• Watch copolymer blends; may shift if another monomer predominates