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HSChapter 39
U.S. imports of polycarbonates, primary forms (HS 390740) totaled $31.3M in April 2026, traded with 30 countries.
Last updated: April 2026 dataPolycarbonates are high-performance engineering thermoplastics valued for optical clarity, impact resistance, and heat tolerance, making them essential in automotive glazing, optical media, electronic housings, and medical devices. South Korea is the dominant US import source, with Canada and Mexico also supplying meaningful volumes—the latter two benefiting from USMCA proximity. Classified under a single 10-digit line (3907400000), polycarbonate resin grades vary by melt flow index and molecular weight, and specification mismatches can cause processing problems downstream. Importers should also be aware that polycarbonate from certain Asian origins may carry Section 301 exposure depending on the supply chain.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
MFI is a critical commercial specification—low-MFI grades suit structural and glazing applications while high-MFI grades are used for thin-wall injection molding. MFI is not a classification criterion under HTS 3907.40, so it need not be declared on the entry, but it should be specified in purchase contracts and technical documentation to ensure the correct grade is delivered and to support any quality disputes.
Polycarbonate originating in Canada or Mexico may qualify for USMCA preferential tariff treatment if it meets the applicable rules of origin, including any required tariff shift or regional value content threshold. Importers must obtain a valid certification of origin from the producer or exporter and retain it for five years to support the preference claim.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| MEXICO | $3.0M | $37.6M | +$34.6M |
| CANADA | $6.5M | $11.8M | +$5.3M |
| KOREA, SOUTH | $6.8M | $299K | -$6.5M |
| GERMANY | $3.9M | $457K | -$3.5M |
| THAILAND | $4.1M | $37K | -$4.0M |
Monthly import values over time