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HSChapter 39
U.S. imports of saturated polyesters (non-enumerated), primary forms (HS 390799) totaled $43.8M in April 2026, traded with 54 countries.
Importers of Saturated Polyesters (Non-Enumerated), Primary Forms paid $5.6M in duties in April 2026 — an effective duty rate of 16% on $35.5M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataSaturated polyesters in primary forms encompass a commercially diverse group including polybutylene terephthalate (PBT), thermoplastic liquid crystal aromatic polyester copolymers, and other engineering-grade resins used in electronics, automotive connectors, and packaging. The four 10-digit lines under this heading — 3907990100, 3907992000, 3907995010, and 3907995050 — reflect meaningful performance distinctions: liquid crystal polymers (LCPs) command premium pricing for high-frequency circuit board applications, while PBT (3907995010) is a workhorse for injection-molded parts. Germany and Taiwan are the leading suppliers, reflecting the concentration of specialty polymer production in those markets.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Liquid crystal polymers (LCPs) are classified separately at 3907992000 because of their unique self-reinforcing molecular structure, which delivers exceptional dimensional stability and low dielectric loss. Standard saturated polyesters and PBT that lack this aromatic LCP architecture fall under 3907995010 or 3907995050.
Germany is the leading supplier under this heading. Imports from Germany do not benefit from a US free trade agreement, so the general MFN duty rate applies. Importers should also check whether any Section 301 or other trade-remedy orders are in effect for the specific product at the time of entry.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| MEXICO | $4.2M | $28.1M | +$23.9M |
| CHINA | $1.3M | $26.4M | +$25.1M |
| CANADA | $4.4M | $9.8M | +$5.4M |
| GERMANY | $6.5M | $1.9M | -$4.5M |
| NETHERLANDS | $2.2M | $5.6M | +$3.5M |
Supplier Network
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 3907995050 | POLYESTERS,NESOI | $33.0M | 16.15% | $4.1M |
| 3907995010 | POLYBUTYLENE TEREPHTHLATE, NESOI | $8.6M | 15.51% | $1.3M |
| 3907992000 | THERMOPLASTIC LIQ CRYSTAL AROM POLYESTER COPOLYMER | $2.1M | 12.35% | $236K |
POLYESTERS,NESOI
POLYBUTYLENE TEREPHTHLATE, NESOI
THERMOPLASTIC LIQ CRYSTAL AROM POLYESTER COPOLYMER
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3907990100 | POLYESTERS, SATURATED, IN PRIMARY FORMS, NESOI | $105.1M |
POLYESTERS, SATURATED, IN PRIMARY FORMS, NESOI
18.8M kg
ARTICLES OF PLASTICS, NESOI
HS 392690
FLOOR, WALL, ETC COVERS, VINYL CHLORIDE POLYMERS
HS 391810
TABLEWARE AND KITCHENWARE OF PLASTICS
HS 392410
SACKS & BAGS (INCL CONES) OF POLYMERS OF ETHYLENE
HS 392321
HOUSEHOLD AND TOILET ARTICLES NESOI OF PLASTICS
HS 392490
PLATES, SHEETS ETC, NON-CELL ETC, POLYMER
HS 392010
| Port | Imports | Exports | Balance |
|---|---|---|---|
| CHARLESTON, SC | $4.3M | $37.2M | +$33.0M |
| LAREDO, TX | $4.2M | $14.3M | +$10.1M |
| NORFOLK-NEWPORT NEWS, VA | $3.1M | $7.5M | +$4.4M |